OcNOS-DC : Layer 3 Guide : Unicast Configuration Guide : BGP Labeled Unicast
BGP Labeled Unicast
As well as distributing routes, BGP with Multiprotocol Extensions (MP-BGP) can advertise MPLS label mappings that are mapped to routes. BGP Labeled Unicast (BGP-LU) attaches an MPLS label to an advertised IGP prefix and distributes the MPLS label mapped to the prefix to its peers.
With BGP-LU, a network can be divided into multiple regions to limit the total number of LSPs and enable failures to be contained and restored in a single region These regions operate separate instances of the IGP and use BGP-LU to advertise route information between inter-region routers.
A configuration for BGP-LU uses these type of nodes:
ā€¢ Provider Edge (PE) nodes advertise label bindings to remote PEs in other regions. These advertisements only affect the PE routers and the ABRs and not provider routers (ā€œPā€) in the core network.
ā€¢ Area Border Router (ABR) nodes advertise the label bindings to remote PEs in other regions.
BGP Labeled Unicast as Transport
Topology
BGP labeled unicast
Configuration
PE1
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 11.11.11.55/32 secondary
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface xe16
Enter interface mode
(config-if)#ip address 172.4.5.55/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)#exit
Exit interface mode.
(config)#router ospf 1
Configure the routing process OSPF with process Id 1
(config-router)#network 172.4.5.0/24 area 0
Define the interface (172.4.5.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 11.11.11.55/32 area 0
Define the interface (11.11.11.55/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)#router bgp 100
Enter Router BGP mode
(config-router)# neighbor 21.21.21.56 update-source lo
Add loopback ip of PE2 as neighbor with neighbor AS
(config-router)#neighbor 21.21.21.56 update-
source lo
Update the source for that particular neighbor as loopback interface
(config-router)#neighbor 172.4.5.52 remote-
as 100
Add neighbor with neighbor AS
(config-router)#allocate-label all
Allocate labels
(config-router)#address-family ipv4 labeled- unicast
Enter into labeled-unicast address family
(config-router-af)#neighbor 172.4.5.52 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)#exit-address-family
Exit from address family IPv4 labeled unicast
(config-router)#address-family vpnv4 unicast
Enter into vpnv4 unicast address family
(config-router-af)#neighbor 21.21.21.56 activate
Activate the neighbor inside vpnv4 address family
(config-router-af)#exit-address-family
Exit from address family vpnv4.
(config-router)#address-family ipv4 unicast
Enter into ipv4 unicast address family
(config-router-af)#network 11.11.11.55/32
Advertise the loopback of RTR1 in BGP
(config-router-af)#exit-address-family
Exit from address family vpnv4
(config-router)#exit
Exit from router BGP mode
(config)# ip vrf vrf1
Specify the name of the VRF (vrf1) to be created.
(config-vrf)#rd 10:100
Assign a route distinguisher (RD) for the VRF, which is a unique value on the router. The RD value can be in ASN:NN or A.B.C.D:NN format.
(config-vrf)#route-target both 100:300
Specify the 2-Octet AS specific or IPv4 specific Transitive Route-Target extended community attribute.
(config-vrf)#exit
Exit VRF mode, and return to Configure mode.
(config)#interface xe10
Enter interface mode
(config-if)# ip vrf forwarding vrf1
Bind the interface (eth2) to the VRF vrf1
(config-if)# ip address 172.10.20.55/24
Configure the IP address of the interface eth2
(config-if)#exit
Exit interface mode.
(config)#router bgp 100
Enter Router BGP mode
(config-router)# address-family ipv4 vrf vrf1
Enter address family ipv4 vrf mode
(config-router-af)# redistribute connected
Redistribute connected routes
(config-router-af)#end
Exit from router mode into privilege mode
ABR1
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 22.22.22.52/32 secondary
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface xe16
Enter interface mode
(config-if)#ip address 172.4.5.52/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)#exit
Exit interface mode.
(config)#interface xe12
Enter interface mode
(config-if)#ip address 172.6.7.52/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)#exit
Exit interface mode.
(config)#router ospf 1
Configure the routing process OSPF with process Id 1
(config-router)#network 172.4.5.0/24 area 0
Define the interface (172.4.5.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 172.6.7.0/24 area 0
Define the interface (172.6.7.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)#router bgp 100
Enter Router BGP mode
(config-router)# neighbor 172.4.5.55 remote-as 100
Add neighbor with neighbor AS
(config-router)# neighbor 172.6.7.54 remote-as 100
Add neighbor with neighbor AS
(config-router)#allocate-label all
Allocate labels
(config-router)# address-family ipv4 labeled-unicast
Enter into labeled-unicast address family
(config-router-af)#neighbor 172.6.7.54 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)#neighbor 172.4.5.55 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)# neighbor 172.4.5.55 route-reflector-client
Enable Route reflector client for the neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 172.6.7.54 route-reflector-client
Enable Route reflector client for the neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 172.4.5.55 next-hop-self
Enable next hop self for the particular neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 172.6.7.54 next-hop-self
Enable next hop self for the particular neighbor inside address family IPv4 labeled unicast
(config-router-af)#exit-address-family
Exit address-family mode
(config-router)#exit
Exit from router BGP mode
(config)#end
Exit from config mode
P1
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)# ip address 200.200.200.54/32 secondary
Configure the IP address of the interface loopbak
(config-if)#exit
Exit interface mode
(config)#interface xe16
Enter interface mode
(config-if)#ip address 172.1.2.54/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)#exit
Exit interface mode.
(config)#interface xe12
Enter interface mode
(config-if)#ip address 172.6.7.54/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)#exit
Exit interface mode.
(config)#router ospf 1
Configure the routing process OSPF with process Id 1
(config-router)#network 172.1.2.0/24 area 0
Define the interface (172.1.2.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 172.6.7.0/24 area 0
Define the interface (172.6.7.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)#router bgp 100
Enter Router BGP mode
(config-router)# neighbor 172.1.2.53 remote-as 100
Add neighbor with neighbor AS
(config-router)# neighbor 172.6.7.52 remote-as 100
Add neighbor with neighbor AS
(config-router)#allocate-label all
Allocate labels
(config-router)# address-family ipv4 labeled-unicast
Enter into labeled-unicast address family
(config-router-af)#neighbor 172.6.7.52 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)#neighbor 172.1.2.53 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)# neighbor 172.1.2.53 route-reflector-client
Enable Route reflector client for the neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 172.6.7.52 route-reflector-client
Enable Route reflector client for the neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 172.1.2.53 next-hop-self
Enable next hop self for the particular neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 172.6.7.52 next-hop-self
Enable next hop self for the particular neighbor inside address family IPv4 labeled unicast
(config-router)# exit-address-family
Exit from address family.
(config-router)#exit
Exit from router BGP mode
(config)#end
Exit from config mode
ABR2
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)# ip address 44.44.44.53/32 secondary
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface xe16
Enter interface mode
(config-if)#ip address 172.1.2.53/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)#exit
Exit interface mode.
(config)#interface xe10
Enter interface mode
(config-if)#ip address 172.3.4.53/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)#exit
Exit interface mode.
(config)#router ospf 1
Configure the routing process OSPF with process Id 1
(config-router)#network 172.1.2.0/24 area 0
Define the interface (172.1.2.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 172.3.4.0/24 area 0
Define the interface (172.3.4.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)#router bgp 100
Enter Router BGP mode
(config-router)# neighbor 172.1.2.54 remote-as 100
Add neighbor with neighbor AS
(config-router)# neighbor 172.3.4.56 remote-as 100
Add neighbor with neighbor AS
(config-router)#allocate-label all
Allocate labels
(config-router)# address-family ipv4 labeled-unicast
Enter into labeled-unicast address family
(config-router-af)#neighbor 172.3.4.56 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)#neighbor 172.1.2.54 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)# neighbor 172.3.4.56 route-reflector-client
Enable Route reflector client for the neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 172.1.2.54 route-reflector-client
Enable Route reflector client for the neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 172.3.4.56 next-hop-self
Enable next hop self for the particular neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 172.1.2.54 next-hop-self
Enable next hop self for the particular neighbor inside address family IPv4 labeled unicast
(config-router-af)#exit-address-family
Exit from address family vpnv4
(config-router)#exit
Exit from router BGP mode
(config)#end
Exit from config mode
PE2
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 21.21.21.56/32 secondary
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface xe10
Enter interface mode
(config-if)#ip address 172.3.4.56/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)#exit
Exit interface mode.
(config)#router ospf 1
Configure the routing process OSPF with process Id 1
(config-router)#network 172.3.4.0/24 area 0
Define the interface (172.3.4.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 21.21.21.56/32 area 0
Define the interface (21.21.21.56/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)#router bgp 100
Enter Router BGP mode
(config-router)#neighbor 11.11.11.55 remote-as 100
Add loopback ip of PE1 as neighbor with neighbor AS
(config-router)#neighbor 11.11.11.55 update-source lo
Update the source for that particular neighbor as loopback interface
(config-router)# neighbor 172.3.4.53 remote-as 100
Add neighbor with neighbor AS
(config-router)#allocate-label all
Allocate labels
(config-router)# address-family ipv4 labeled-unicast
Enter into labeled-unicast address family
(config-router-af)#neighbor 172.3.4.53 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)#exit-address-family
Exit from address family IPv4 labeled unicast
(config-router)#address-family vpnv4 unicast
Enter into vpnv4 unicast address family
(config-router-af)#neighbor 11.11.11.55 activate
Activate the neighbor inside vpnv4 address family
(config-router-af)#exit-address-family
Exit from address family vpnv4
(config-router-af)#network 21.21.21.56/32
Advertise the loopback in BGP
(config-router-af)#exit-address-family
Exit from address family ipv4 unicast
(config-router)#exit
Exit from router BGP mode
(config)# ip vrf vrf1
Specify the name of the VRF (vrf1) to be created.
(config-vrf)#rd 10:100
Assign a route distinguisher (RD) for the VRF, which is a unique value on the router. The RD value can be in ASN:NN or A.B.C.D:NN format.
(config-vrf)#route-target both 100:300
Specify the 2-Octet AS specific or IPv4 specific Transitive Route-Target extended community attribute.
(config-vrf)#exit
Exit VRF mode, and return to Configure mode.
(config)#interface xe0
Enter interface mode
(config-if)# ip vrf forwarding vrf1
Bind the interface (eth2) to the VRF vrf1
(config-if)# ip address 172.23.4.56/24
Configure the IP address of the interface eth2
(config-if)#exit
Exit interface mode.
(config)#router bgp 100
Enter Router BGP mode
(config-router)# address-family ipv4 vrf vrf1
Enter address family ipv4 vrf mode
(config-router)# redistribute connected
Redistribute connected routes
(config-router)#end
Exit from router mode into privilege mode
Validation
PE1
 
PE1#show ip bgp neighbors 21.21.21.56
BGP neighbor is 21.21.21.56, remote AS 100, local AS 100, internal link
BGP version 4, local router ID 11.11.11.55, remote router ID 21.21.21.56
BGP state = Established, up for 00:01:32
Last read 00:00:21, hold time is 90, keepalive interval is 30 seconds
Neighbor capabilities:
Route refresh: advertised and received (old and new)
Address family VPNv4 Unicast: advertised and received
Received 7 messages, 0 notifications, 0 in queue
Sent 9 messages, 0 notifications, 0 in queue
Route refresh request: received 1, sent 0
Minimum time between advertisement runs is 5 seconds
Update source is lo
For address family: VPNv4 Unicast
BGP table version 2, neighbor version 2
Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
1 accepted prefixes
1 announced prefixes
 
Connections established 1; dropped 0
Local host: 11.11.11.55, Local port: 179
Foreign host: 21.21.21.56, Foreign port: 38231
Nexthop: 11.11.11.55
Nexthop global: ::
Nexthop local: ::
BGP connection: non shared network
 
 
PE1#show ip bgp neighbors 172.4.5.52
BGP neighbor is 172.4.5.52, remote AS 100, local AS 100, internal link
BGP version 4, local router ID 11.11.11.55, remote router ID 22.22.22.52
BGP state = Established, up for 00:26:00
Last read 00:00:07, hold time is 90, keepalive interval is 30 seconds
Neighbor capabilities:
Route refresh: advertised and received (old and new)
Address family IPv4 Unicast: received
Address family IPv4 Labeled-Unicast: advertised and received
Received 67 messages, 2 notifications, 0 in queue
Sent 70 messages, 2 notifications, 0 in queue
Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds
For address family: IPv4 Labeled-Unicast
BGP table version 2, neighbor version 2
Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
1 accepted prefixes
1 announced prefixes
 
Connections established 3; dropped 2
Local host: 172.4.5.55, Local port: 179
Foreign host: 172.4.5.52, Foreign port: 34324
Nexthop: 172.4.5.55
Nexthop global: ::
Nexthop local: ::
BGP connection: non shared network
Last Reset: 00:26:00, due to Administratively Reset (Cease Notification sent)
Notification Error Message: (Cease/Administratively Reset.)
 
PE1#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
S - stale
Network Next Hop In Label Out Label
*> 11.11.11.55/32 0.0.0.0 24320 -
*>i 21.21.21.56/32 172.4.5.52 24322 24321
 
PE1#show mpls forwarding-table
Codes: > - installed FTN, * - selected FTN, p - stale FTN,
B - BGP FTN, K - CLI FTN, t - tunnel, P - SR Policy FTN,
L - LDP FTN, R - RSVP-TE FTN, S - SNMP FTN, I - IGP-Shortcut,
U - unknown FTN, O - SR-OSPF FTN, i - SR-ISIS FTN, k - SR-CLI FTN
 
Code FEC FTN-ID Nhlfe-ID Tunnel-id Pri LSP-Type O
ut-Label Out-Intf ELC Nexthop
B> 21.21.21.56/32 1 2 - - LSP_DEFAULT 2
4321 xe16 No 172.4.5.52
PE1#
 
PE1#show mpls ilm-table
Codes: > - installed ILM, * - selected ILM, p - stale ILM
K - CLI ILM, T - MPLS-TP, s - Stitched ILM
S - SNMP, L - LDP, R - RSVP, C - CRLDP
B - BGP , K - CLI , V - LDP_VC, I - IGP_SHORTCUT
O - OSPF/OSPF6 SR, i - ISIS SR, k - SR CLI
P - SR Policy, U - unknown
 
Code FEC/VRF/L2CKT ILM-ID In-Label Out-Label In-Intf Out-Intf
/VRF Nexthop LSP-Type
B> vrf1 2 24321 Nolabel N/A vrf1
N/A LSP_DEFAULT
B> 11.11.11.55/32 1 24320 Nolabel N/A N/A
127.0.0.1 LSP_DEFAULT
B> 21.21.21.56/32 3 24322 24321 N/A N/A
172.4.5.52 LSP_DEFAULT
PE1#
 
ABR1
 
ABR1#show ip ospf neighbor
 
Total number of full neighbors: 2
OSPF process 1 VRF(default):
Neighbor ID Pri State Dead Time Address Interface Instance ID
11.11.11.55 1 Full/DR 00:00:35 172.4.5.55 xe16 0
200.200.200.54 1 Full/Backup 00:00:32 172.6.7.54 xe12 0
ABR1#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*>i 11.11.11.55/32 172.4.5.55 24320 24320
*>i 21.21.21.56/32 172.6.7.54 24321 24321
 
ABR1#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*>i 11.11.11.55/32 172.4.5.55 24320 24320
*>i 21.21.21.56/32 172.6.7.54 24321 24321
 
ABR1#show mpls forwarding-table | include 11.11.11.55
B> 11.11.11.55/32 1 0 Yes LSP_DEFAULT 24320 xe16 No 172.4.5.55
 
P1
 
P1#show ip bgp neighbors 172.6.7.52
BGP neighbor is 172.6.7.52, remote AS 100, local AS 100, internal link
BGP version 4, local router ID 200.200.200.54, remote router ID 22.22.22.52
BGP state = Established, up for 01:33:27
Last read 00:00:12, hold time is 90, keepalive interval is 30 seconds
Neighbor capabilities:
Route refresh: advertised and received (old and new)
Address family IPv4 Unicast: received
Address family IPv4 Labeled-Unicast: advertised and received
Received 229 messages, 0 notifications, 0 in queue
Sent 227 messages, 2 notifications, 0 in queue
Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds
For address family: IPv4 Labeled-Unicast
BGP table version 7, neighbor version 7
Index 1, Offset 0, Mask 0x2
Route-Reflector Client
NEXT_HOP is always this router
Community attribute sent to this neighbor (both)
1 accepted prefixes
1 announced prefixes
 
Connections established 3; dropped 2
Local host: 172.6.7.54, Local port: 47560
Foreign host: 172.6.7.52, Foreign port: 179
Nexthop: 172.6.7.54
Nexthop global: ::
Nexthop local: ::
BGP connection: non shared network
Last Reset: 01:33:32, due to Configuration Change (Cease Notification sent)
Notification Error Message: (Cease/Other Configuration Change.)
 
P1#show ip bgp neighbors 172.1.2.53
BGP neighbor is 172.1.2.53, remote AS 100, local AS 100, internal link
BGP version 4, local router ID 200.200.200.54, remote router ID 44.44.44.53
BGP state = Established, up for 01:35:08
Last read 00:00:19, hold time is 90, keepalive interval is 30 seconds
Neighbor capabilities:
Route refresh: advertised and received (old and new)
Address family IPv4 Labeled-Unicast: advertised and received
Received 230 messages, 2 notifications, 0 in queue
Sent 233 messages, 0 notifications, 0 in queue
Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds
For address family: IPv4 Labeled-Unicast
BGP table version 7, neighbor version 7
Index 2, Offset 0, Mask 0x4
Route-Reflector Client
NEXT_HOP is always this router
Community attribute sent to this neighbor (both)
1 accepted prefixes
1 announced prefixes
 
Connections established 3; dropped 2
Local host: 172.1.2.54, Local port: 179
Foreign host: 172.1.2.53, Foreign port: 58824
Nexthop: 172.1.2.54
Nexthop global: ::
Nexthop local: ::
BGP connection: non shared network
Last Reset: 01:35:13, due to BGP Notification received
Notification Error Message: (Cease/Other Configuration Change.)
 
P1#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*>i 11.11.11.55/32 172.6.7.52 24320 24320
*>i 21.21.21.56/32 172.1.2.53 24321 24321
 
P1#show mpls forwarding-table | include 11.11.11.55
B> 11.11.11.55/32 1 1 - - LSP_DEFAULT 24320 xe12 No 172.6.7.52
 
ABR2
 
ABR2#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
S - stale
Network Next Hop In Label Out Label
*>i 11.11.11.55/32 172.1.2.54 24320 24320
*>i 21.21.21.56/32 172.3.4.56 24321 24321
 
ABR2#show mpls forwarding-table | include 11.11.11.55
B> 11.11.11.55/32 1 1 - - LSP_DEFAULT 24320 xe16 No 172.1.2.54
 
PE2#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*>i 11.11.11.55/32 172.3.4.53 24320 24320
*> 21.21.21.56/32 0.0.0.0 24321 -
 
PE2#show mpls forwarding-table | include 11.11.11.55
B> 11.11.11.55/32 1 1 - - LSP_DEFAULT 24320 xe10 No 172.3.4.53
 
PE2#show mpls ftn-table
Primary FTN entry with FEC: 11.11.11.55/32, id: 1, row status: Active, Tunnel-Policy: N/A
Owner: BGP, distance: 0, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A, Color: 0
Cross connect ix: 1, in intf: - in label: 0 out-segment ix: 1
Owner: BGP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 1, owner: BGP, Stale: NO, out intf: xe10, out label: 24320
Nexthop addr: 172.3.4.53 cross connect ix: 1, op code: Push
 
PE2#show mpls vrf-table
Output for IPv4 VRF table with id: 2
Primary FTN entry with FEC: 172.10.20.0/24, id: 1, row status: Active, Tunnel-Policy: N/A
Owner: BGP, distance: 0, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Transport Tunnel id: 0, Protected LSP id: 0, Description: N/A, Color: 0
Cross connect ix: 3, in intf: - in label: 0 out-segment ix: 2
Owner: BGP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 2, owner: BGP, Stale: NO, BGP out intf: xe10, transport out intf: xe10, out label: 24321
Nexthop addr: 11.11.11.55 cross connect ix: 3, op code: Push and Lookup
 
 
PE2#show mpls ilm-table
Codes: > - installed ILM, * - selected ILM, p - stale ILM
K - CLI ILM, T - MPLS-TP, s - Stitched ILM
S - SNMP, L - LDP, R - RSVP, C - CRLDP
B - BGP , K - CLI , V - LDP_VC, I - IGP_SHORTCUT
O - OSPF/OSPF6 SR, i - ISIS SR, k - SR CLI
P - SR Policy, U - unknown
 
Code FEC/VRF/L2CKT ILM-ID In-Label Out-Label In-Intf Out-Intf/VRF Nexthop LSP-Type
B> 21.21.21.56/32 2 24321 Nolabel N/A N/A 127.0.0.1 LSP_DEFAULT
B> 11.11.11.55/32 1 24320 24320 N/A N/A 172.3.4.53 LSP_DEFAULT
B> vrf1 3 24322 Nolabel N/A vrf1 N/A LSP_DEFAULT
 
BGP Labeled Unicast with Seamless MPLS
Topology
BGP_LU with MPLS
Configuration
PE1
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 1.1.1.54/32 secondary
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface eth1
Enter interface mode
(config-if)#ip address 10.1.1.54/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)# enable-ldp ipv4
Enable LDP process on eth1 interface
(config-if)#exit
Exit interface mode.
(config)#router ospf 10
Configure the routing process OSPF with process id 10
(config-router)#network 1.1.1.54/32 area 0
Define the interface (1.1.1.54/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 10.1.1.0/24 area 0
Define the interface (10.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)#router bgp 100
Enter Router BGP mode
(config-router)#neighbor 7.7.7.55 remote-
as 100
Add loopback ip of PE2 as neighbor with neighbor AS
(config-router)#neighbor 7.7.7.55 update-
source lo
Update the source for that particular neighbor as loopback interface
(config-router)#neighbor 3.3.3.52 remote-
as 100
Add loopback ip of ABR1 as neighbor with neighbor AS
(config-router)#neighbor 3.3.3.52 update-
source lo
Update the source for that particular neighbor as loopback interface
(config-router)#allocate-label all
Allocate labels
(config-router)#address-family ipv4 labeled- unicast
Enter into labeled-unicast address family
(config-router-af)#neighbor 3.3.3.52 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)#exit-address-family
Exit from address family IPv4 labeled unicast
(config-router)#address-family vpnv4 unicast
Enter into vpnv4 unicast address family
(config-router-af)#neighbor 7.7.7.55 activate
Activate the neighbor inside vpnv4 address family
(config-router)#address-family ipv4 labeled- unicast
Enter into labeled-unicast address family
(config-router)#address-family ipv4 unicast
Enter into ipv4 unicast address family
(config-router-af)#network 1.1.1.54/32
Advertise the loopback of RTR1 in BGP
(config-router-af)#exit-address-family
Exit from address family
(config-router)#exit
Exit from router BGP mode
(config)# router ldp
Configure Router LDP instance
(config-router)# transport-address ipv4 1.1.1.54 0
Configure Transport address for LDP with label space value 0
(config-router)#exit
Exit from router mode
(config)# ip vrf vrf1
Specify the name of the VRF (vrf1) to be created.
(config-vrf)#rd 10:100
Assign a route distinguisher (RD) for the VRF, which is a unique value on the router. The RD value can be in ASN:NN or A.B.C.D:NN format.
(config-vrf)#route-target both 100:300
Specify the 2-Octet AS specific or IPv4 specific Transitive Route-Target extended community attribute.
(config-vrf)#exit
Exit VRF mode, and return to Configure mode.
(config)#interface eth2
Enter interface mode
(config-if)# ip vrf forwarding vrf1
Bind the interface (eth2) to the VRF vrf1
(config-if)# ip address 61.1.1.54/24
Configure the IP address of the interface eth2
(config-if)#exit
Exit interface mode.
(config)#router bgp 100
Enter Router BGP mode
(config-router)# address-family ipv4 vrf vrf1
Enter address family ipv4 vrf mode
(config-router-af)# redistribute connected
Redistribute connected routes
(config-router-af)#end
Exit from router mode into privilege mode
P1
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 2.2.2.23/32
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface eth1
Enter interface mode
(config-if)#ip address 10.1.1.23/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)# enable-ldp ipv4
Enable LDP process on eth1 interface
(config-if)#exit
Exit interface mode.
(config)#interface eth2
Enter interface mode
(config-if)#ip address 20.1.1.23/24
Configure the IP address of the interface eth2
(config-if)#label-switching
Enable label-switching on interface eth2
(config-if)# enable-ldp ipv4
Enable LDP process on eth2 interface
(config-if)#exit
Exit interface mode.
(config)#router ospf 10
Configure the routing process OSPF with process id 10
(config-router)#network 20.1.1.0/24 area 0
Define the interface (20.1.1.0/24)) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 10.1.1.0/24 area 0
Define the interface (10.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 2.2.2.23/32 area 0
Define the interface (2.2.2.23/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)# router ldp
Configure Router LDP instance
(config-router)# transport-address ipv4 2.2.2.23 0
Configure Transport address for LDP with label space value 0
(config-router)#exit
Exit from router mode
(config)# ip route 7.7.7.55/32 20.1.1.52
Specify the destination prefix and mask for the network and a gateway.
(config)# end
Exit from config mode
ABR1
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 3.3.3.52/32
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface eth1
Enter interface mode
(config-if)#ip address 30.1.1.52/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)# enable-ldp ipv4
Enable LDP process on eth1 interface
(config-if)#exit
Exit interface mode.
(config)#interface eth2
Enter interface mode
(config-if)#ip address 20.1.1.52/24
Configure the IP address of the interface eth2
(config-if)#label-switching
Enable label-switching on interface eth2
(config-if)# enable-ldp ipv4
Enable LDP process on eth2 interface
(config-if)#exit
Exit interface mode.
(config)#router ospf 20
Configure the routing process OSPF with process id 20
(config-router)#network 3.3.3.52/32 area 0
Define the interface (3.3.3.52/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 20.1.1.0/24 area 0
Define the interface (20.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)# router ldp
Configure Router LDP instance
(config-router)# transport-address ipv4 3.3.3.52 0
Configure Transport address for LDP with label space value 0
(config-router)#exit
Exit from router mode
(config)#router bgp 100
Enter Router BGP mode
(config-router)#neighbor 1.1.1.54 remote-
as 100
Add loopback ip of PE2 as neighbor with neighbor AS
(config-router)#neighbor 1.1.1.54 update-
source lo
Update the source for that particular neighbor as loopback interface
(config-router)#neighbor 5.5.5.56 remote-
as 100
Add loopback ip of ABR1 as neighbor with neighbor AS
(config-router)#neighbor 5.5.5.56 update-
source lo
Update the source for that particular neighbor as loopback interface
(config-router)#allocate-label all
Allocate labels
(config-router)#address-family ipv4 labeled- unicast
Enter into labeled-unicast address family
(config-router-af)#neighbor 1.1.1.54 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)#neighbor 5.5.5.56 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)# neighbor 1.1.1.54 route-reflector-client
Enable Route reflector client for the neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 5.5.5.56 route-reflector-client
Enable Route reflector client for the neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 1.1.1.54 next-hop-self
Enable next hop self for the particular neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 5.5.5.56 next-hop-self
Enable next hop self for the particular neighbor inside address family IPv4 labeled unicast
(config-router-af)#exit-address-family
Exit from address family labeled-unicast
(config-router)#exit
Exit from router BGP mode
P2
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 4.4.4.53/32
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface eth1
Enter interface mode
(config-if)#ip address 30.1.1.53/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)# enable-ldp ipv4
Enable LDP process on eth1 interface
(config-if)#exit
Exit interface mode.
(config)#interface eth2
Enter interface mode
(config-if)#ip address 40.1.1.53/24
Configure the IP address of the interface eth2
(config-if)#label-switching
Enable label-switching on interface eth2
(config-if)# enable-ldp ipv4
Enable LDP process on eth2 interface
(config-if)#exit
Exit interface mode
(config)#router ospf 20
Configure the routing process OSPF with process id 20
(config-router)#network 30.1.1.0/24 area 0
Define the interface (30.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 40.1.1.0/24 area 0
Define the interface (40.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 4.4.4.53/32 area 0
Define the interface (4.4.4.53/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)# router ldp
Configure Router LDP instance
(config-router)# transport-address ipv4 4.4.4.53 0
Configure Transport address for LDP with label space value 0
(config-router)#exit
Exit from router mode
ABR2
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 5.5.5.56/32
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface eth1
Enter interface mode
(config-if)#ip address 50.1.1.56/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)# enable-ldp ipv4
Enable LDP process on eth1 interface
(config-if)#exit
Exit interface mode.
(config)#interface eth2
Enter interface mode
(config-if)#ip address 40.1.1.56/24
Configure the IP address of the interface eth2
(config-if)#label-switching
Enable label-switching on interface eth2
(config-if)# enable-ldp ipv4
Enable LDP process on eth2 interface
(config-if)#exit
Exit interface mode.
(config)#router ospf 30
Configure the routing process OSPF with process id 20
(config-router)#network 5.5.5.56/32 area 0
Define the interface 5.5.5.56/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 50.1.1.0/24 area 0
Define the interface (50.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)#router ospf 20
Configure the routing process OSPF with process id 20
(config-router)#network 5.5.5.56/32 area 0
Define the interface 5.5.5.56/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 40.1.1.0/24 area 0
Define the interface (40.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)# router ldp
Configure Router LDP instance
(config-router)# transport-address ipv4 3.3.3.52 0
Configure Transport address for LDP with label space value 0
(config-router)#exit
Exit from router mode
(config)#router bgp 100
Enter Router BGP mode
(config-router)#neighbor 3.3.3.52 remote-
as 100
Add loopback ip of PE2 as neighbor with neighbor AS
(config-router)#neighbor 3.3.3.52 update-
source lo
Update the source for that particular neighbor as loopback interface
(config-router)#neighbor 7.7.7.55 remote-
as 100
Add loopback ip of ABR1 as neighbor with neighbor AS
(config-router)#neighbor 7.7.7.55 update-
source lo
Update the source for that particular neighbor as loopback interface
(config-router)#address-family ipv4 labeled- unicast
Enter into labeled-unicast address family
(config-router-af)#neighbor 3.3.3.52 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)#neighbor 7.7.7.55 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)# neighbor 3.3.3.52 route-reflector-client
Enable Route reflector client for the neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 7.7.7.55 route-reflector-client
Enable Route reflector client for the neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 3.3.3.52 next-hop-self
Enable next hop self for the particular neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 7.7.7.55 next-hop-self
Enable next hop self for the particular neighbor inside address family IPv4 labeled unicast
(config-router-af)#exit-address-family
Exit from address family labeled-unicast
(config-router)#exit
Exit from router BGP mode
P3
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 6.6.6.22/32
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface eth1
Enter interface mode
(config-if)#ip address 50.1.1.22/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)# enable-ldp ipv4
Enable LDP process on eth1 interface
(config-if)#exit
Exit interface mode.
(config)#interface eth2
Enter interface mode
(config-if)#ip address 60.1.1.22/24
Configure the IP address of the interface eth2
(config-if)#label-switching
Enable label-switching on interface eth2
(config-if)# enable-ldp ipv4
Enable LDP process on eth2 interface
(config-if)#exit
Exit interface mode
(config)#router ospf 30
Configure the routing process OSPF with process id 20
(config-router)#network 50.1.1.0/24 area 0
Define the interface (30.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 60.1.1.0/24 area 0
Define the interface (40.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 6.6.6.22/32 area 0
Define the interface (4.4.4.53/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)# router ldp
Configure Router LDP instance
(config-router)# transport-address ipv4 6.6.6.22 0
Configure Transport address for LDP with label space value 0
(config-router)#exit
Exit from router mode
(config)# ip route 1.1.1.54/32 50.1.1.56
Specify the destination prefix and mask for the network and a gateway.
(config)#exit
Exit from config mode
PE2
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 7.7.7.55/32 secondary
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface eth2
Enter interface mode
(config-if)#ip address 60.1.1.55/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)# enable-ldp ipv4
Enable LDP process on eth1 interface
(config-if)#exit
Exit interface mode.
(config)#router ospf 30
Configure the routing process OSPF with process id 10
(config-router)#network 7.7.7.55/32 area 0
Define the interface (7.7.7.55/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 60.1.1.0/24 area 0
Define the interface (60.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)#router bgp 100
Enter Router BGP mode
(config-router)#neighbor 1.1.1.54 remote-
as 100
Add loopback ip of PE2 as neighbor with neighbor AS
(config-router)#neighbor 1.1.1.54 update-
source lo
Update the source for that particular neighbor as loopback interface
(config-router)#neighbor 5.5.5.56 remote-
as 100
Add loopback ip of ABR1 as neighbor with neighbor AS
(config-router)#neighbor 5.5.5.56 update-
source lo
Update the source for that particular neighbor as loopback interface
(config-router)#allocate-label all
Allocate labels
(config-router)#address-family ipv4 labeled- unicast
Enter into labeled-unicast address family
(config-router-af)#neighbor 5.5.5.56 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)#exit-address-family
Exit from address family IPv4 labeled unicast
(config-router)#address-family vpnv4 unicast
Enter into vpnv4 unicast address family
(config-router-af)#neighbor 1.1.1.54 activate
Activate the neighbor inside vpnv4 address family
(config-router-af)#exit-address-family
Exit from address family vpnv4
(config-router)#address-family ipv4 unicast
Enter into ipv4 unicast address family
(config-router-af)#network 7.7.7.55/32
Advertise the loopback of RTR1 in BGP
(config-router-af)#exit-address-family
Exit from address family
(config-router)#exit
Exit from router BGP mode
(config)# router ldp
Configure Router LDP instance
(config-router)# transport-address ipv4 7.7.7.55 0
Configure Transport address for LDP with label space value 0
(config-router)#exit
Exit from router mode
(config)# ip vrf vrf1
Specify the name of the VRF (vrf1) to be created.
(config-vrf)#rd 10:100
Assign a route distinguisher (RD) for the VRF, which is a unique value on the router. The RD value can be in ASN:NN or A.B.C.D:NN format.
(config-vrf)#route-target both 100:300
Specify the 2-Octet AS specific or IPv4 specific Transitive Route-Target extended community attribute.
(config-vrf)#exit
Exit VRF mode, and return to Configure mode.
(config)#interface eth2
Enter interface mode
(config-if)# ip vrf forwarding vrf1
Bind the interface (eth2) to the VRF vrf1
(config-if)# ip address 62.1.1.55/24
Configure the IP address of the interface eth2
(config-if)#exit
Exit interface mode.
(config)#router bgp 100
Enter Router BGP mode
(config-router)# address-family ipv4 vrf vrf1
Enter address family ipv4 vrf mode
(config-router-af)# redistribute connected
Redistribute connected routes
(config-router-af)#end
Exit from router mode into privilege mode
Validation
PE1
#show ip bgp neighbors 3.3.3.52
BGP neighbor is 3.3.3.52, remote AS 100, local AS 100, internal link
BGP version 4, local router ID 1.1.1.54, remote router ID 3.3.3.52
BGP state = Established, up for 00:00:06
Last read 00:00:07, hold time is 90, keepalive interval is 30 seconds Neighbor capabilities:
Route refresh: advertised and received (old and new)
Received 4 messages, 1 notifications, 0 in queue
Sent 6 messages, 0 notifications, 0 in queue Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds Update source is lo
For address family: IPv4 Unicast
BGP table version 1, neighbor version 1 Index 0, Offset 0, Mask 0x1
Community attribute sent to this neighbor (both)
0 accepted prefixes
1 announced prefixes
 
For address family: IPv4 Labeled-Unicast
BGP table version 1, neighbor version 1
Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
0 accepted prefixes
1 announced prefixes
 
Connections established 2; dropped 1
Local host: 1.1.1.54, Local port: 179
Foreign host: 3.3.3.52, Foreign port: 46745
Nexthop: 1.1.1.54
Nexthop global: 54::54 Nexthop local: ::
BGP connection: non shared network
Last Reset: 00:00:11, due to BGP Notification received Notification Error Message: (Cease/Other Configuration Change.)
 
#show ip bgp neighbors 7.7.7.55
BGP neighbor is 7.7.7.55, remote AS 100, local AS 100, internal link
BGP version 4, local router ID 1.1.1.54, remote router ID 7.7.7.55
BGP state = Established, up for 00:01:10
Last read 00:00:11, hold time is 90, keepalive interval is 30 seconds Neighbor capabilities:
Route refresh: advertised and received (old and new)
Received 8 messages, 1 notifications, 0 in queue
Sent 9 messages, 2 notifications, 0 in queue Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds Update source is lo
For address family: VPNv4 Unicast
BGP table version 3, neighbor version 3 Index 0, Offset 0, Mask 0x1
Community attribute sent to this neighbor (both)
1 accepted prefixes
1 announced prefixes
 
Connections established 3; dropped 2
Local host: 1.1.1.54, Local port: 179
 
Foreign host: 7.7.7.55, Foreign port: 58871
Nexthop: 1.1.1.54
Nexthop global: 54::54 Nexthop local: ::
BGP connection: non shared network
Last Reset: 00:01:10, due to BGP Notification sent Notification Error Message: (Cease/Administratively Reset.)
 
 
#show mpls vrf-table
Output for IPv4 VRF table with id: 2
Primary FTN entry with FEC: 62.1.1.0/24, id: 1, row status: Active
Owner: BGP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 12, in intf: - in label: 0 out-segment ix: 11 Owner: BGP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 11, owner: BGP, out intf: eth1, out label: 24961 Nexthop addr: 7.7.7.55 cross connect ix: 12, op code: Push and
Lookup
 
#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*> 1.1.1.54/32 0.0.0.0 24961 -
*>i 7.7.7.55/32 3.3.3.52 - 24961
#show mpls forwarding-table | include 7.7.7.55
B> 7.7.7.55/32 4 0 Yes LSP_DEFAULT 24961
eth1 3.3.3.52
 
#show mpls ilm-table
Codes: > - installed ILM, * - selected ILM, p - stale ILM K - CLI ILM, T - MPLS-TP, S - Stitched ILM
 
Code FEC ILM-ID In-Label Out-Label In-Intf Out- Intf Nexthop LSP-Type
> 1.1.1.54/32 11 24961 N/A N/A N/A
127.0.0.1 LSP_DEFAULT
> 61.1.1.0/24 13 24963 N/A N/A eth2
0.0.0.0 LSP_DEFAULT
 
#show mpls ftn-table
Primary FTN entry with FEC: 2.2.2.23/32, id: 1, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 1, in intf: - in label: 0 out-segment ix: 1 Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 1, owner: LDP, out intf: eth1, out label: 3 Nexthop addr: 10.1.1.23 cross connect ix: 1, op code: Push
 
Primary FTN entry with FEC: 3.3.3.52/32, id: 2, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 2, in intf: - in label: 0 out-segment ix: 2 Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 2, owner: LDP, out intf: eth1, out label: 24320
 
Nexthop addr: 10.1.1.23 cross connect ix: 2, op code: Push
 
Primary FTN entry with FEC: 7.7.7.55/32, id: 4, row status: Active
Owner: BGP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 4, in intf: - in label: 0 out-segment ix: 3 Owner: BGP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 3, owner: BGP, out intf: eth1, out label: 24961 Nexthop addr: 3.3.3.52 cross connect ix: 4, op code: Push and
Lookup
 
 
Primary FTN entry with FEC: 20.1.1.0/24, id: 3, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 1, in intf: - in label: 0 out-segment ix: 1 Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 1, owner: LDP, out intf: eth1, out label: 3 Nexthop addr: 10.1.1.23 cross connect ix: 1, op code: Push
 
P1
#show ip ospf neighbor
 
Total number of full neighbors: 2
OSPF process 10 VRF(default):
Neighbor ID Pri State Dead Time Address Interface Instance ID
1.1.1.54 1 Full/Backup 00:00:38 10.1.1.54 eth1 0
3.3.3.52 1 Full/DR 00:00:39 20.1.1.52 eth2 0
#show ldp session
Peer IP Address IF Name My Role State KeepAlive UpTime
1.1.1.54 eth1 Active OPERATIONAL 30 00:00:21
3.3.3.52 eth2 Passive OPERATIONAL 30 00:00:15
ABR1
#show ip bgp neighbors 1.1.1.54
BGP neighbor is 1.1.1.54, remote AS 100, local AS 100, internal link BGP version 4, local router ID 3.3.3.52, remote router ID 1.1.1.54 BGP state = Established, up for 00:00:09
Last read 00:00:05, hold time is 90, keepalive interval is 30 seconds Neighbor capabilities:
Route refresh: advertised and received (old and new) Address family IPv4 Unicast: advertised and received Address family IPv4 Labeled-Unicast: advertised and received
Received 5 messages, 0 notifications, 0 in queue
Sent 4 messages, 1 notifications, 0 in queue Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds Update source is lo
For address family: IPv4 Unicast
BGP table version 1, neighbor version 1 Index 0, Offset 0, Mask 0x1
Community attribute sent to this neighbor (both)
1 accepted prefixes
 
0 announced prefixes
 
For address family: IPv4 Labeled-UnicastBGP table version 2, neighbor version 2 Index 0, Offset 0, Mask 0x1
Route-Reflector Client NEXT_HOP is always this router
Community attribute sent to this neighbor (both)
1 accepted prefixes
0 announced prefixes
 
Connections established 2; dropped 1
Local host: 3.3.3.52, Local port: 46745
Foreign host: 1.1.1.54, Foreign port: 179
Nexthop: 3.3.3.52
Nexthop global: 52::52 Nexthop local: ::
BGP connection: non shared network
Last Reset: 00:00:14, due to BGP Notification sent Notification Error Message: (Cease/Other Configuration Change.)
 
#show ip bgp neighbors 5.5.5.56
BGP neighbor is 5.5.5.56, remote AS 100, local AS 100, internal link BGP version 4, local router ID 3.3.3.52, remote router ID 5.5.5.56 BGP state = Established, up for 00:00:11
Last read 00:00:02, hold time is 90, keepalive interval is 30 seconds Neighbor capabilities:
Route refresh: advertised and received (old and new) Address family IPv4 Unicast: advertised and received Address family IPv4 Labeled-Unicast: advertised and received
Received 4 messages, 0 notifications, 0 in queue
Sent 6 messages, 2 notifications, 0 in queue Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds Update source is lo
For address family: IPv4 Unicast
BGP table version 1, neighbor version 1 Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
1 accepted prefixes
1 announced prefixes
 
For address family: IPv4 Labeled-UnicastBGP table version 3, neighbor version 2 Index 1, Offset 0, Mask 0x2
Route-Reflector Client NEXT_HOP is always this router
Community attribute sent to this neighbor (both)
1 accepted prefixes
1 announced prefixes
 
Connections established 2; dropped 1
Local host: 3.3.3.52, Local port: 179
Foreign host: 5.5.5.56, Foreign port: 40440
Nexthop: 3.3.3.52
Nexthop global: 52::52 Nexthop local: ::
 
BGP connection: non shared network
Last Reset: 00:00:11, due to BGP Notification sent Notification Error Message: (Cease/Administratively Reset.)
 
#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*>i 1.1.1.54/32 1.1.1.54 24960 24961
*>i 7.7.7.55/32 5.5.5.56 24961 24961
 
#show mpls forwarding-table | include 1.1.1.54
L> 1.1.1.54/32 1 0 Yes LSP_DEFAULT 24321 eth2 20.1.1.23
B 1.1.1.54/32 7 0 Yes LSP_DEFAULT 24961 eth2 1.1.1.54
 
#show mpls forwarding-table | include 7.7.7.55
B> 7.7.7.55/32 8 0 Yes LSP_DEFAULT 24961 eth1 5.5.5.56
 
#show mpls ftn-table
Primary FTN entry with FEC: 1.1.1.54/32, id: 1, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 2, in intf: - in label: 0 out-segment ix: 2
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 2, owner: LDP, out intf: eth2, out label: 24321
Nexthop addr: 20.1.1.23 cross connect ix: 2, op code: Push
 
 
Primary FTN entry with FEC: 1.1.1.54/32, id: 7, row status: Active
Owner: BGP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 11, in intf: - in label: 0 out-segment ix: 10
Owner: BGP, Persistent: No, Admin Status: Down, Oper Status: Down
Out-segment with ix: 10, owner: BGP, out intf: eth2, out label: 24961
Nexthop addr: 1.1.1.54 cross connect ix: 11, op code: Push and Lookup
 
 
Primary FTN entry with FEC: 2.2.2.23/32, id: 2, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 5, in intf: - in label: 0 out-segment ix: 4
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 4, owner: LDP, out intf: eth2, out label: 3
Nexthop addr: 20.1.1.23 cross connect ix: 5, op code: Push
 
 
Primary FTN entry with FEC: 4.4.4.53/32, id: 4, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 7, in intf: - in label: 0 out-segment ix: 6
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 6, owner: LDP, out intf: eth1, out label: 3
Nexthop addr: 30.1.1.53 cross connect ix: 7, op code: Push
 
 
Primary FTN entry with FEC: 5.5.5.56/32, id: 5, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 10, in intf: - in label: 0 out-segment ix: 9
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 9, owner: LDP, out intf: eth1, out label: 24320
Nexthop addr: 30.1.1.53 cross connect ix: 10, op code: Push
 
 
Primary FTN entry with FEC: 7.7.7.55/32, id: 8, row status: Active
Owner: BGP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 12, in intf: - in label: 0 out-segment ix: 11
Owner: BGP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 11, owner: BGP, out intf: eth1, out label: 24961
Nexthop addr: 5.5.5.56 cross connect ix: 12, op code: Push and Lookup
 
 
Primary FTN entry with FEC: 10.1.1.0/24, id: 3, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 5, in intf: - in label: 0 out-segment ix: 4
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 4, owner: LDP, out intf: eth2, out label: 3
Nexthop addr: 20.1.1.23 cross connect ix: 5, op code: Push
 
 
Primary FTN entry with FEC: 40.1.1.0/24, id: 6, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 7, in intf: - in label: 0 out-segment ix: 6
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 6, owner: LDP, out intf: eth1, out label: 3
Nexthop addr: 30.1.1.53 cross connect ix: 7, op code: Push
P2
#show ip ospf neighbor
 
Total number of full neighbors: 2 OSPF process 20 VRF(default):
Neighbor ID Pri State Dead Time Address Interface Instance ID
3.3.3.52 1 Full/Backup 00:00:39 30.1.1.52 eth1
0
5.5.5.56 1 Full/DR 00:00:40 40.1.1.56 eth2
0
 
#show ldp session
Peer IP Address IF Name My Role State KeepAlive UpTime
3.3.3.52 eth1 Active OPERATIONAL 30 00:00:21
5.5.5.56 eth2 Passive OPERATIONAL 30 00:00:19
 
ABR2
#show ip bgp neighbors 3.3.3.52
 
BGP neighbor is 3.3.3.52, remote AS 100, local AS 100, internal link BGP version 4, local router ID 5.5.5.56, remote router ID 3.3.3.52 BGP state = Established, up for 00:00:12
Last read 00:00:07, hold time is 90, keepalive interval is 30 seconds Neighbor capabilities:
Route refresh: advertised and received (old and new) Address family IPv4 Unicast: advertised and received Address family IPv4 Labeled-Unicast: advertised and received
Received 5 messages, 1 notifications, 0 in queue
Sent 5 messages, 0 notifications, 0 in queue Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds Update source is lo
For address family: IPv4 Unicast
BGP table version 1, neighbor version 1 Index 0, Offset 0, Mask 0x1
Community attribute sent to this neighbor (both)
1 accepted prefixes
1 announced prefixes
 
For address family: IPv4 Labeled-UnicastBGP table version 2, neighbor version 2 Index 0, Offset 0, Mask 0x1
Route-Reflector Client NEXT_HOP is always this router
Community attribute sent to this neighbor (both)
1 accepted prefixes
1 announced prefixes
 
Connections established 2; dropped 1
Local host: 5.5.5.56, Local port: 40440
Foreign host: 3.3.3.52, Foreign port: 179
Nexthop: 5.5.5.56
Nexthop global: 56::56 Nexthop local: ::
BGP connection: non shared network
Last Reset: 00:00:17, due to BGP Notification received Notification Error Message: (Cease/Other Configuration Change.)
 
#show ip bgp neighbors 7.7.7.55
BGP neighbor is 7.7.7.55, remote AS 100, local AS 100, internal link BGP version 4, local router ID 5.5.5.56, remote router ID 7.7.7.55 BGP state = Established, up for 00:00:13
Last read 00:00:08, hold time is 90, keepalive interval is 30 seconds Neighbor capabilities:
Route refresh: advertised and received (old and new) Address family IPv4 Unicast: advertised and received Address family IPv4 Labeled-Unicast: advertised and received
Received 3 messages, 0 notifications, 0 in queue
Sent 4 messages, 0 notifications, 0 in queue Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds Update source is lo
For address family: IPv4 Unicast
BGP table version 1, neighbor version 1 Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
 
1 accepted prefixes
1 announced prefixes
 
For address family: IPv4 Labeled-UnicastBGP table version 2, neighbor version 2 Index 1, Offset 0, Mask 0x2
Route-Reflector Client NEXT_HOP is always this router
Community attribute sent to this neighbor (both)
1 accepted prefixes
1 announced prefixes
 
Connections established 1; dropped 0
Local host: 5.5.5.56, Local port: 35004
Foreign host: 7.7.7.55, Foreign port: 179
Nexthop: 5.5.5.56
Nexthop global: 56::56 Nexthop local: ::
BGP connection: non shared network
 
#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*>i 1.1.1.54/32 3.3.3.52 24960 24960
*>i 7.7.7.55/32 7.7.7.55 24961 24960
 
#show mpls forwarding-table | include 1.1.1.54
B> 1.1.1.54/32 7 0 Yes LSP_DEFAULT 24960 eth2 3.3.3.52
 
#show mpls forwarding-table | include 7.7.7.55
L> 7.7.7.55/32 5 0 Yes LSP_DEFAULT 24320 eth1 50.1.1.22
B 7.7.7.55/32 8 0 Yes LSP_DEFAULT 24960 eth1 7.7.7.55
 
#show mpls ftn-table
Primary FTN entry with FEC: 1.1.1.54/32, id: 7, row status: Active
Owner: BGP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 11, in intf: - in label: 0 out-segment ix: 10
Owner: BGP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 10, owner: BGP, out intf: eth2, out label: 24960
Nexthop addr: 3.3.3.52 cross connect ix: 11, op code: Push and Lookup
 
 
Primary FTN entry with FEC: 3.3.3.52/32, id: 1, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 4, in intf: - in label: 0 out-segment ix: 3
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 3, owner: LDP, out intf: eth2, out label: 24321
Nexthop addr: 40.1.1.53 cross connect ix: 4, op code: Push
 
 
Primary FTN entry with FEC: 4.4.4.53/32, id: 2, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 5, in intf: - in label: 0 out-segment ix: 4
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 4, owner: LDP, out intf: eth2, out label: 3
Nexthop addr: 40.1.1.53 cross connect ix: 5, op code: Push
 
 
Primary FTN entry with FEC: 6.6.6.22/32, id: 4, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 7, in intf: - in label: 0 out-segment ix: 6
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 6, owner: LDP, out intf: eth1, out label: 3
Nexthop addr: 50.1.1.22 cross connect ix: 7, op code: Push
 
 
Primary FTN entry with FEC: 7.7.7.55/32, id: 5, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 10, in intf: - in label: 0 out-segment ix: 9
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 9, owner: LDP, out intf: eth1, out label: 24320
Nexthop addr: 50.1.1.22 cross connect ix: 10, op code: Push
 
 
Primary FTN entry with FEC: 7.7.7.55/32, id: 8, row status: Active
Owner: BGP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 12, in intf: - in label: 0 out-segment ix: 11
Owner: BGP, Persistent: No, Admin Status: Down, Oper Status: Down
Out-segment with ix: 11, owner: BGP, out intf: eth1, out label: 24960
Nexthop addr: 7.7.7.55 cross connect ix: 12, op code: Push and Lookup
 
 
Primary FTN entry with FEC: 30.1.1.0/24, id: 3, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 5, in intf: - in label: 0 out-segment ix: 4
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 4, owner: LDP, out intf: eth2, out label: 3
Nexthop addr: 40.1.1.53 cross connect ix: 5, op code: Push
 
 
Primary FTN entry with FEC: 60.1.1.0/24, id: 6, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 7, in intf: - in label: 0 out-segment ix: 6
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 6, owner: LDP, out intf: eth1, out label: 3
Nexthop addr: 50.1.1.22 cross connect ix: 7, op code: Push
P3
#show ip ospf neighbor
 
Total number of full neighbors: 2
OSPF process 30 VRF(default):
Neighbor ID Pri State Dead Time Address Interface Instance ID
5.5.5.56 1 Full/Backup 00:00:39 50.1.1.56 eth1 0
7.7.7.55 1 Full/DR 00:00:39 60.1.1.55 eth2 0
 
#show ldp session
Peer IP Address IF Name My Role State KeepAlive UpTime
5.5.5.56 eth1 Active OPERATIONAL 30 00:00:30
7.7.7.55 eth2 Passive OPERATIONAL 30 00:00:28
PE2
#show ip bgp neighbors 5.5.5.56
BGP neighbor is 5.5.5.56, remote AS 100, local AS 100, internal link BGP version 4, local router ID 7.7.7.55, remote router ID 5.5.5.56 BGP state = Established, up for 00:00:16
Last read 00:00:11, hold time is 90, keepalive interval is 30 seconds Neighbor capabilities:
Route refresh: advertised and received (old and new) Address family IPv4 Unicast: advertised and received Address family IPv4 Labeled-Unicast: advertised and received
Received 3 messages, 0 notifications, 0 in queue
Sent 4 messages, 0 notifications, 0 in queue Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds Update source is lo
For address family: IPv4 Unicast
BGP table version 1, neighbor version 1 Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
1 accepted prefixes
1 announced prefixes
 
For address family: IPv4 Labeled-UnicastBGP table version 2, neighbor version 2 Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
1 accepted prefixes
1 announced prefixes
 
Connections established 1; dropped 0
Local host: 7.7.7.55, Local port: 179
Foreign host: 5.5.5.56, Foreign port: 35004
Nexthop: 7.7.7.55
Nexthop global: 55::55 Nexthop local: ::
BGP connection: non shared network
 
#show mpls vrf-table
Output for IPv4 VRF table with id: 2
Primary FTN entry with FEC: 61.1.1.0/24, id: 1, row status: Active
Owner: BGP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 11, in intf: - in label: 0 out-segment ix: 10
 
Owner: BGP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 10, owner: BGP, out intf: eth2, out label: 24963 Nexthop addr: 1.1.1.54 cross connect ix: 11, op code: Push and
Lookup
 
#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*>i 1.1.1.54/32 5.5.5.56 - 24960
*> 7.7.7.55/32 0.0.0.0 24960 -
#show mpls forwarding-table | include 1.1.1.54
B> 1.1.1.54/32 4 0 Yes LSP_DEFAULT 24960
eth2 5.5.5.56
 
#show mpls ilm-table
Codes: > - installed ILM, * - selected ILM, p - stale ILM K - CLI ILM, T - MPLS-TP, S - Stitched ILM
 
Code FEC ILM-ID In-Label Out-Label In-Intf Out- Intf Nexthop LSP-Type
> 7.7.7.55/32 9 24960 N/A N/A N/A
127.0.0.1 LSP_DEFAULT
> 62.1.1.0/24 10 24961 N/A N/A eth1
0.0.0.0 LSP_DEFAULT
 
#show mpls ftn-table
Primary FTN entry with FEC: 1.1.1.54/32, id: 4, row status: Active
Owner: BGP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 4, in intf: - in label: 0 out-segment ix: 3 Owner: BGP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 3, owner: BGP, out intf: eth2, out label: 24960 Nexthop addr: 5.5.5.56 cross connect ix: 4, op code: Push and
Lookup
 
Primary FTN entry with FEC: 5.5.5.56/32, id: 1, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 1, in intf: - in label: 0 out-segment ix: 1 Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 1, owner: LDP, out intf: eth2, out label: 24321 Nexthop addr: 60.1.1.22 cross connect ix: 1, op code: Push
 
Primary FTN entry with FEC: 6.6.6.22/32, id: 2, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 2, in intf: - in label: 0 out-segment ix: 2 Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 2, owner: LDP, out intf: eth2, out label: 3 Nexthop addr: 60.1.1.22 cross connect ix: 2, op code: Push
 
Primary FTN entry with FEC: 50.1.1.0/24, id: 3, row status: Active
 
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 2, in intf: - in label: 0 out-segment ix: 2 Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 2, owner: LDP, out intf: eth2, out label: 3 Nexthop addr: 60.1.1.22 cross connect ix: 2, op code: Push
 
BGP Labeled Unicast with Inter-AS
Topology
BGP Labeled unicast with Inter-AS
Configurations
PE1
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 1.1.1.54/32 secondary
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface eth1
Enter interface mode
(config-if)#ip address 10.1.1.54/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)# enable-ldp ipv4
Enable LDP process on eth1 interface
(config-if)#exit
Exit interface mode.
(config)#router ospf 10
Configure the routing process OSPF with process id 10
(config-router)#network 1.1.1.54/32 area 0
Define the interface (1.1.1.54/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 10.1.1.0/24 area 0
Define the interface (10.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)#router bgp 100
Enter Router BGP mode
(config-router)#neighbor 7.7.7.55 remote-
as 100
Add loopback ip of PE2 as neighbor with neighbor AS
(config-router)#neighbor 7.7.7.55 update-
source lo
Update the source for that particular neighbor as loopback interface
(config-router)#neighbor 3.3.3.52 remote-
as 100
Add loopback ip of ABR1 as neighbor with neighbor AS
(config-router)#neighbor 3.3.3.52 update-
source lo
Update the source for that particular neighbor as loopback interface
(config-router)#allocate-label all
Allocate labels
(config-router)#address-family ipv4 labeled- unicast
Enter into labeled-unicast address family
(config-router-af)#neighbor 3.3.3.52 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)#exit-address-family
Exit from address family IPv4 labeled unicast
(config-router)#address-family vpnv4 unicast
Enter into vpnv4 unicast address family
(config-router-af)#neighbor 7.7.7.55 activate
Activate the neighbor inside vpnv4 address family
(config-router-af)#network 1.1.1.54/32
Advertise the loopback of RTR1 in BGP
(config-router-af)#exit-address-family
Exit from address family vpnv4
(config-router)#exit
Exit from router BGP mode
(config)# router ldp
Configure Router LDP instance
(config-router)# transport-address ipv4 1.1.1.54 0
Configure Transport address for LDP with label space value 0
(config-router)#exit
Exit from router mode
(config)# ip vrf vrf1
Specify the name of the VRF (vrf1) to be created.
(config-vrf)#rd 10:100
Assign a route distinguisher (RD) for the VRF, which is a unique value on the router. The RD value can be in ASN:NN or A.B.C.D:NN format.
(config-vrf)#route-target both 100:300
Specify the 2-Octet AS specific or IPv4 specific Transitive Route-Target extended community attribute.
(config-vrf)#exit
Exit VRF mode, and return to Configure mode.
(config)#interface eth2
Enter interface mode
(config-if)# ip vrf forwarding vrf1
Bind the interface (eth2) to the VRF vrf1
(config-if)# ip address 61.1.1.54/24
Configure the IP address of the interface eth2
(config-if)#exit
Exit interface mode.
(config)#router bgp 100
Enter Router BGP mode
(config-router)# address-family ipv4 vrf vrf1
Enter address family ipv4 vrf mode
(config-router-af)# redistribute connected
Redistribute connected routes
(config-router-af)#end
Exit from router mode into privilege mode
P1
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 2.2.2.23/32
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface eth1
Enter interface mode
(config-if)#ip address 10.1.1.23/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)# enable-ldp ipv4
Enable LDP process on eth1 interface
(config-if)#exit
Exit interface mode.
(config)#interface eth2
Enter interface mode
(config-if)#ip address 20.1.1.23/24
Configure the IP address of the interface eth2
(config-if)#label-switching
Enable label-switching on interface eth2
(config-if)# enable-ldp ipv4
Enable LDP process on eth2 interface
(config-if)#exit
Exit interface mode.
(config)#router ospf 10
Configure the routing process OSPF with process id 10
(config-router)#network 20.1.1.0/24 area 0
Define the interface (20.1.1.0/24)) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 10.1.1.0/24 area 0
Define the interface (10.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 2.2.2.23/32 area 0
Define the interface (2.2.2.23/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)# router ldp
Configure Router LDP instance
(config-router)# transport-address ipv4 2.2.2.23 0
Configure Transport address for LDP with label space value 0
(config-router)#exit
Exit from router mode
(config)# ip route 7.7.7.55/32 20.1.1.52
Specify the destination prefix and mask for the network and a gateway.
(config)# end
Exit from config mode
ABR1
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 3.3.3.52/32
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface eth1
Enter interface mode
(config-if)#ip address 52.56.1.52/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)# enable-ldp ipv4
Enable LDP process on eth1 interface
(config-if)#exit
Exit interface mode.
(config)#interface eth2
Enter interface mode
(config-if)#ip address 20.1.1.52/24
Configure the IP address of the interface eth2
(config-if)#label-switching
Enable label-switching on interface eth2
(config-if)# enable-ldp ipv4
Enable LDP process on eth2 interface
(config-if)#exit
Exit interface mode.
(config)#router ospf 10
Configure the routing process OSPF with process id 20
(config-router)#network 3.3.3.52/32 area 0
Define the interface (3.3.3.52/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 20.1.1.0/24 area 0
Define the interface (20.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)# router ldp
Configure Router LDP instance
(config-router)# transport-address ipv4 3.3.3.52 0
Configure Transport address for LDP with label space value 0
(config-router)#exit
Exit from router mode
(config)#router bgp 100
Enter Router BGP mode
(config-router)#neighbor 1.1.1.54 remote-
as 100
Add loopback ip of PE2 as neighbor with neighbor AS
(config-router)#neighbor 1.1.1.54 update-
source lo
Update the source for that particular neighbor as loopback interface
(config-router)#neighbor 52.56.1.56 remote-
as 100
Add loopback ip of ABR1 as neighbor with neighbor AS
(config-router)#allocate-label all
Allocate labels
(config-router)#address-family ipv4 labeled- unicast
Enter into labeled-unicast address family
(config-router-af)#neighbor 1.1.1.54 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)#neighbor 52.56.1.56 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)# neighbor 1.1.1.54 route-reflector-client
Enable Route reflector client for the neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 1.1.1.54 next-hop-self
Enable next hop self for the particular neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 52.56.1.56 next-hop-self
Enable next hop self for the particular neighbor inside address family IPv4 labeled unicast
(config-router-af)#exit-address-family
Exit from address family labeled-unicast
(config-router)#exit
Exit from router BGP mode
ABR2
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 5.5.5.56/32
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface eth1
Enter interface mode
(config-if)#ip address 50.1.1.56/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)#exit
Exit interface mode.
(config)#interface eth2
Enter interface mode
(config-if)#ip address 52.56.1.56/24
Configure the IP address of the interface eth2
(config-if)#label-switching
Enable label-switching on interface eth2
(config-if)#exit
Exit interface mode.
(config)#router ospf 30
Configure the routing process OSPF with process Id 1
(config-router)#network 5.5.5.56/32 area 0
Define the interface (5.5.5.56/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 50.1.1.0/24 area 0
Define the interface (50.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)# router ldp
Configure Router LDP instance
(config-router)# transport-address ipv4 5.5.5.56 0
Configure Transport address for LDP with label space value 0
(config-router)#exit
Exit from router mode
(config)#router bgp 200
Enter Router BGP mode
(config-router)#neighbor 52.56.1.52 remote-
as 100
Add neighbor peer ip and neighbor AS
(config-router)#neighbor 7.7.7.55 remote-
as 100
Add loopback ip of PE2 as neighbor with neighbor AS
(config-router)#neighbor 7.7.7.55 update-
source lo
Update the source for that particular neighbor as loopback interface
(config-router)#allocate-label all
Allocate labels
(config-router)#address-family ipv4 labeled- unicast
Enter into labeled-unicast address family
(config-router-af)#neighbor 52.56.1.52 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)#neighbor 7.7.7.55 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)# neighbor 7.7.7.55 route-reflector-client
Enable Route reflector client for the neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 52.56.1.52 next-hop-self
Enable next hop self for the particular neighbor inside address family IPv4 labeled unicast
(config-router-af)# neighbor 7.7.7.55 next-hop-self
Enable next hop self for the particular neighbor inside address family IPv4 labeled unicast
(config-router-af)#exit-address-family
Exit from address family vpnv4
(config-router)#exit
Exit from router BGP mode
(config)#end
Exit from config mode
P2
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 6.6.6.22/32
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface eth1
Enter interface mode
(config-if)#ip address 50.1.1.22/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)# enable-ldp ipv4
Enable LDP process on eth1 interface
(config-if)#exit
Exit interface mode.
(config)#interface eth2
Enter interface mode
(config-if)#ip address 60.1.1.22/24
Configure the IP address of the interface eth2
(config-if)#label-switching
Enable label-switching on interface eth2
(config-if)# enable-ldp ipv4
Enable LDP process on eth2 interface
(config-if)#exit
Exit interface mode
(config)#router ospf 30
Configure the routing process OSPF with process id 20
(config-router)#network 50.1.1.0/24 area 0
Define the interface (30.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 60.1.1.0/24 area 0
Define the interface (40.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 6.6.6.22/32 area 0
Define the interface (4.4.4.53/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)# router ldp
Configure Router LDP instance
(config-router)# transport-address ipv4 6.6.6.22 0
Configure Transport address for LDP with label space value 0
(config-router)#exit
Exit from router mode
(config)# ip route 1.1.1.54/32 50.1.1.56
Specify the destination prefix and mask for the network and a gateway.
(config)#exit
Exit from Cofig mode
PE2
 
#configure terminal
Enter the Configure mode.
(config)#interface lo
Enter interface mode
(config-if)#ip address 7.7.7.55/32 secondary
Configure the IP address of the interface loopback
(config-if)#exit
Exit interface mode
(config)#interface eth2
Enter interface mode
(config-if)#ip address 60.1.1.55/24
Configure the IP address of the interface eth1
(config-if)#label-switching
Enable label-switching on interface eth1
(config-if)# enable-ldp ipv4
Enable LDP process on eth1 interface
(config-if)#exit
Exit interface mode.
(config)#router ospf 30
Configure the routing process OSPF with process id 10
(config-router)#network 7.7.7.55/32 area 0
Define the interface (7.7.7.55/32) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#network 60.1.1.0/24 area 0
Define the interface (60.1.1.0/24) on which OSPF runs, and associate the area ID (0) with the interface (area ID 0 specifies the backbone area).
(config-router)#exit
Exit from router ospf mode
(config)#router bgp 200
Enter Router BGP mode
(config-router)#neighbor 1.1.1.54 remote-
as 100
Add loopback ip of PE2 as neighbor with neighbor AS
(config-router)#neighbor 1.1.1.54 update-
source lo
Update the source for that particular neighbor as loopback interface
(config-router)#neighbor 1.1.1.54 ebgp-multihop
Enable neighbor connection between two eBGP
(config-router)#neighbor 5.5.5.56 remote-
as 200
Add loopback ip of ABR1 as neighbor with neighbor AS
(config-router)#neighbor 5.5.5.56 update-
source lo
Update the source for that particular neighbor as loopback interface
(config-router)#allocate-label all
Allocate labels
(config-router)#address-family ipv4 labeled- unicast
Enter into labeled-unicast address family
(config-router-af)#neighbor 5.5.5.56 activate
Activate the neighbor inside vpnv4 address family
(config-router-af)#exit-address-family
Exit from address family IPv4 labeled unicast
(config-router)#address-family vpnv4 unicast
Enter into vpnv4 unicast address family
(config-router-af)#neighbor 1.1.1.54 allow-ebgp-vpn
Allow eBGP neighbor to be a vpn peer.
(config-router-af)#neighbor 1.1.1.54 activate
Activate the neighbor inside labeled-unicast address family
(config-router-af)#exit-address-family
Exit from address family vpnv4
(config-router)#address-family ipv4 unicast
Enter into ipv4 unicast address family
(config-router-af)#network 7.7.7.55/32
Advertise the loopback of RTR1 in BGP
(config-router-af)#exit-address-family
Exit from address family vpnv4
(config-router)#exit
Exit from router BGP mode
(config)# router ldp
Configure Router LDP instance
(config-router)# transport-address ipv4 7.7.7.55 0
Configure Transport address for LDP with label space value 0
(config-router)#exit
Exit from router mode
(config)# ip vrf vrf1
Specify the name of the VRF (vrf1) to be created.
(config-vrf)#rd 10:100
Assign a route distinguisher (RD) for the VRF, which is a unique value on the router. The RD value can be in ASN:NN or A.B.C.D:NN format.
(config-vrf)#route-target both 100:300
Specify the 2-Octet AS specific or IPv4 specific Transitive Route-Target extended community attribute.
(config-vrf)#exit
Exit VRF mode, and return to Configure mode.
(config)#interface eth2
Enter interface mode
(config-if)# ip vrf forwarding vrf1
Bind the interface (eth2) to the VRF vrf1
(config-if)# ip address 62.1.1.55/24
Configure the IP address of the interface eth2
(config-if)#exit
Exit interface mode.
(config)#router bgp 100
Enter Router BGP mode
(config-router)# address-family ipv4 vrf vrf1
Enter address family ipv4 vrf mode
(config-router-af)# redistribute connected
Redistribute connected routes
(config-router-af)#end
Exit from router mode into privilege mode
Validation
PE1
#sh ip bgp labeled-unicast
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*> 1.1.1.54/32 0.0.0.0 24969 -
*>i 7.7.7.55/32 3.3.3.52 - 24322
 
 
#sh mpls forwarding-table
Codes: > - installed FTN, * - selected FTN, p - stale FTN, B - BGP FTN, K - CLI FTN, t - tunnel
L - LDP FTN, R - RSVP-TE FTN, S - SNMP FTN, I - IGP-Shortcut,
U - unknown FTN, O - SR-OSPF FTN, i - SR-ISIS FTN, k - SR-CLI FTN
10.1.1.23
10.1.1.23
3.3.3.52
10.1.1.23
 
#sh mpls ftn-table
Nexthop
Primary FTN entry with FEC: 2.2.2.23/32, id: 1, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 1, in intf: - in label: 0 out-segment ix: 1 Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 1, owner: LDP, out intf: eth1, out label: 3 Nexthop addr: 10.1.1.23 cross connect ix: 1, op code: Push
 
Primary FTN entry with FEC: 3.3.3.52/32, id: 3, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 2, in intf: - in label: 0 out-segment ix: 2 Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 2, owner: LDP, out intf: eth1, out label: 24321 Nexthop addr: 10.1.1.23 cross connect ix: 2, op code: Push
 
Primary FTN entry with FEC: 7.7.7.55/32, id: 4, row status: Active
Owner: BGP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 4, in intf: - in label: 0 out-segment ix: 3 Owner: BGP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 3, owner: BGP, out intf: eth1, out label: 24322 Nexthop addr: 3.3.3.52 cross connect ix: 4, op code: Push and
Lookup
 
Primary FTN entry with FEC: 20.1.1.0/24, id: 2, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 1, in intf: - in label: 0 out-segment ix: 1 Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 1, owner: LDP, out intf: eth1, out label: 3 Nexthop addr: 10.1.1.23 cross connect ix: 1, op code: Push
ABR1
#sh ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*>i 1.1.1.54/32 1.1.1.54 24323 24969
*> 7.7.7.55/32 52.56.1.56 24322 24325
 
#sh mpls forwarding-table
Codes: > - installed FTN, * - selected FTN, p - stale FTN,
B - BGP FTN, K - CLI FTN, t - tunnel
L - LDP FTN, R - RSVP-TE FTN, S - SNMP FTN, I - IGP-Shortcut,
U - unknown FTN, O - SR-OSPF FTN, i - SR-ISIS FTN, k - SR-CLI FTN
 
Code FEC FTN-ID Tunnel-id Pri LSP-Type Out-Label Out-Intf Nexthop
L> 1.1.1.54/32 2 0 Yes LSP_DEFAULT 24322 eth2 20.1.1.23
B 1.1.1.54/32 5 0 Yes LSP_DEFAULT 24969 eth2 1.1.1.54
L> 2.2.2.23/32 3 0 Yes LSP_DEFAULT 3 eth2 20.1.1.23
B> 7.7.7.55/32 1 0 Yes LSP_DEFAULT 24325 eth1 52.56.1.56
L> 10.1.1.0/24 4 0 Yes LSP_DEFAULT 3 eth2 20.1.1.23
 
#sh mpls ftn-table
Primary FTN entry with FEC: 1.1.1.54/32, id: 2, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 2, in intf: - in label: 0 out-segment ix: 2
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 2, owner: LDP, out intf: eth2, out label: 24322
Nexthop addr: 20.1.1.23 cross connect ix: 2, op code: Push
 
 
Primary FTN entry with FEC: 1.1.1.54/32, id: 5, row status: Active
Owner: BGP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 8, in intf: - in label: 0 out-segment ix: 8
Owner: BGP, Persistent: No, Admin Status: Down, Oper Status: Down
Out-segment with ix: 8, owner: BGP, out intf: eth2, out label: 24969
Nexthop addr: 1.1.1.54 cross connect ix: 8, op code: Push and Lookup
 
 
Primary FTN entry with FEC: 2.2.2.23/32, id: 3, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 3, in intf: - in label: 0 out-segment ix: 3
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 3, owner: LDP, out intf: eth2, out label: 3
Nexthop addr: 20.1.1.23 cross connect ix: 3, op code: Push
 
 
Primary FTN entry with FEC: 7.7.7.55/32, id: 1, row status: Active
Owner: BGP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 7, in intf: - in label: 0 out-segment ix: 7
Owner: BGP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 7, owner: BGP, out intf: eth1, out label: 24325
Nexthop addr: 52.56.1.56 cross connect ix: 7, op code: Push
 
 
Primary FTN entry with FEC: 10.1.1.0/24, id: 4, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 3, in intf: - in label: 0 out-segment ix: 3
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 3, owner: LDP, out intf: eth2, out label: 3
Nexthop addr: 20.1.1.23 cross connect ix: 3, op code: Push
ABR2
#sh ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*> 1.1.1.54/32 52.56.1.52 24322 24323
*>i 7.7.7.55/32 7.7.7.55 24325 24967
 
#sh mpls forwarding-table
Codes: > - installed FTN, * - selected FTN, p - stale FTN,
B - BGP FTN, K - CLI FTN, t - tunnel
L - LDP FTN, R - RSVP-TE FTN, S - SNMP FTN, I - IGP-Shortcut,
U - unknown FTN, O - SR-OSPF FTN, i - SR-ISIS FTN, k - SR-CLI FTN
 
Code FEC FTN-ID Tunnel-id Pri LSP-Type Out-Label Out-Intf Nexthop
B> 1.1.1.54/32 1 0 Yes LSP_DEFAULT 24323 eth2 52.56.1.52
L> 6.6.6.22/32 2 0 Yes LSP_DEFAULT 3 eth1 50.1.1.22
L> 7.7.7.55/32 3 0 Yes LSP_DEFAULT 24322 eth1 50.1.1.22
B 7.7.7.55/32 5 0 Yes LSP_DEFAULT 24967 eth1 7.7.7.55
L> 60.1.1.0/24 4 0 Yes LSP_DEFAULT 3 eth1 50.1.1.22
 
#sh mpls ftn-table
Primary FTN entry with FEC: 1.1.1.54/32, id: 1, row status: Active
Owner: BGP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 8, in intf: - in label: 0 out-segment ix: 8
Owner: BGP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 8, owner: BGP, out intf: eth2, out label: 24323
Nexthop addr: 52.56.1.52 cross connect ix: 8, op code: Push
 
 
Primary FTN entry with FEC: 6.6.6.22/32, id: 2, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 2, in intf: - in label: 0 out-segment ix: 2
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 2, owner: LDP, out intf: eth1, out label: 3
Nexthop addr: 50.1.1.22 cross connect ix: 2, op code: Push
 
 
Primary FTN entry with FEC: 7.7.7.55/32, id: 3, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 3, in intf: - in label: 0 out-segment ix: 3
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 3, owner: LDP, out intf: eth1, out label: 24322
Nexthop addr: 50.1.1.22 cross connect ix: 3, op code: Push
 
 
Primary FTN entry with FEC: 7.7.7.55/32, id: 5, row status: Active
Owner: BGP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 7, in intf: - in label: 0 out-segment ix: 7
Owner: BGP, Persistent: No, Admin Status: Down, Oper Status: Down
Out-segment with ix: 7, owner: BGP, out intf: eth1, out label: 24967
Nexthop addr: 7.7.7.55 cross connect ix: 7, op code: Push and Lookup
 
 
Primary FTN entry with FEC: 60.1.1.0/24, id: 4, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 2, in intf: - in label: 0 out-segment ix: 2
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 2, owner: LDP, out intf: eth1, out label: 3
Nexthop addr: 50.1.1.22 cross connect ix: 2, op code: Push
PE2
#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*>i 1.1.1.54/32 5.5.5.56 - 24322
*> 7.7.7.55/32 0.0.0.0 24967 -
 
#show mpls forwarding-table
Codes: > - installed FTN, * - selected FTN, p - stale FTN,
B - BGP FTN, K - CLI FTN, t - tunnel
L - LDP FTN, R - RSVP-TE FTN, S - SNMP FTN, I - IGP-Shortcut,
U - unknown FTN, O - SR-OSPF FTN, i - SR-ISIS FTN, k - SR-CLI FTN
 
Code FEC FTN-ID Tunnel-id Pri LSP-Type Out-Label Out-Intf Nexthop
B> 1.1.1.54/32 4 0 Yes LSP_DEFAULT 24322 eth2 5.5.5.56
L> 5.5.5.56/32 3 0 Yes LSP_DEFAULT 24321 eth2 60.1.1.22
L> 6.6.6.22/32 2 0 Yes LSP_DEFAULT 3 eth2 60.1.1.22
L> 50.1.1.0/24 1 0 Yes LSP_DEFAULT 3 eth2 60.1.1.22
 
#sh mpls ftn-table
Primary FTN entry with FEC: 1.1.1.54/32, id: 4, row status: Active
Owner: BGP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 36, in intf: - in label: 0 out-segment ix: 37
Owner: BGP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 37, owner: BGP, out intf: eth2, out label: 24322
Nexthop addr: 5.5.5.56 cross connect ix: 36, op code: Push and Lookup
 
 
Primary FTN entry with FEC: 5.5.5.56/32, id: 3, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 7, in intf: - in label: 0 out-segment ix: 6
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 6, owner: LDP, out intf: eth2, out label: 24321
Nexthop addr: 60.1.1.22 cross connect ix: 7, op code: Push
 
 
Primary FTN entry with FEC: 6.6.6.22/32, id: 2, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 9, in intf: - in label: 0 out-segment ix: 8
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 8, owner: LDP, out intf: eth2, out label: 3
Nexthop addr: 60.1.1.22 cross connect ix: 9, op code: Push
 
 
Primary FTN entry with FEC: 50.1.1.0/24, id: 1, row status: Active
Owner: LDP, Action-type: Redirect to LSP, Exp-bits: 0x0, Incoming DSCP: none
Tunnel id: 0, Protected LSP id: 0, Description: N/A
Cross connect ix: 9, in intf: - in label: 0 out-segment ix: 8
Owner: LDP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 8, owner: LDP, out intf: eth2, out label: 3
Nexthop addr: 60.1.1.22 cross connect ix: 9, op code: Push
BGP Peer Groups for Address-Family IPv4 Labeled Unicast
Topology
BGP Peer-Groups with IPv4 Labeled-Unicast Members
R1
 
(config)# interface lo
Enter interface mode for Loopback
(config-if)#ip address 1.1.1.1/32 secondary
Configure ip address for Loopback interface
(config-if)#ip address 11.11.11.11/32 secondary
Configure ip address for Loopback interface
(config-if)#exit
Exit interface mode
(config)#router bgp 200
Define the routing process. The number 200 specifies the AS number of R1.
(config-router)#neighbor ABC peer-group
Create a peer group named ABC.
(config-router)#neighbor ABC remote-as 200
Assign options to the peer group named ABC.
(config-router)#neighbor 2.2.2.2 peer-group ABC
Define neighbor 2.2.2.2 (R2) as a peer group member.
(config-router)#neighbor 3.3.3.3 peer-group ABC
Define neighbor 3.3.3.3 (R3) as a peer group member.
(config-router)#address-family ipv4 labeled-unicast
Enter address-family ipv4 labeled-unicast mode
(config-router-af)#neighbor ABC activate
Activate the peer-group ABC for address-family ipv4 labeled-unicast
(config-router-af)#neighbor ABC route-reflector-client
Configure the peer-group ABC to be route-reflector-client
(config-router-af)# exit-address-family
Exit address-family ipv4 labeled-unicast mode
(config-router)#address-family ipv4 unicast
Enter address-family ipv4 unicast mode
(config-router-af)#network 1.1.1.1/32
Advertise the network 1.1.1.1/32
(config-router-af)#network 11.11.11.11/32
Advertise the network 11.11.11.11/32
(config-router-af)# exit-address-family
Exit address-family ipv4 unicast mode
(config-router)#allocate-label all
Allocate labels for all IPv4 prefixes advertised
(config-router)#exit
Exit router bgp mode
R2
#configure terminal
Enter configure mode.
(config)#router bgp 200
Define the routing process. The number 200 specifies the AS number of R2.
(config-router)#neighbor 2.2.2.1 remote-as 200
Create a TCP connection with neighbor 2.2.2.1 of AS 200.
config-router)#allocate-label all
Allocate labels for all IPv4 prefixes advertised
(config-router)#address-family ipv4 labeled-unicast
Enter address-family ipv4 labeled-unicast mode
(config-router-af)#neighbor 2.2.2.1 activate
Activate the neighbor R1 for address-family ipv4 labeled-unicast
(config-router-af)# exit-address-family
Exit address-family ipv4 labeled-unicast mode
(config-router)# exit
Exit router bgp mode
R3
#configure terminal
Enter configure mode.
(config)#router bgp 200
Define the routing process. The number 200 specifies the AS number of R3.
(config-router)#neighbor 3.3.3.1 remote-as 200
Create a TCP connection with neighbor 3.3.3.1 of AS 200.
config-router)#allocate-label all
Allocate labels for all IPv4 prefixes advertised
(config-router)#address-family ipv4 labeled-unicast
Enter address-family ipv4 labeled-unicast mode
(config-router-af)#neighbor 3.3.3.1 activate
Activate the neighbor R1 for address-family ipv4 labeled-unicast
(config-router-af)# exit-address-family
Exit address-family ipv4 labeled-unicast mode
(config-router)# exit
Exit router bgp mode
Validation
R1
R1#show ip bgp labeled-unicast summary
BGP router identifier 10.12.65.126, local AS number 200
BGP table version is 1
1 BGP AS-PATH entries
0 BGP community entries
 
Neighbor V AS MsgRcv MsgSen TblVer InQ OutQ Up/Down State/PfxRcd
2.2.2.2 4 200 18 22 1 0 0 00:00:57 0
3.3.3.3 4 200 18 20 1 0 0 00:00:01 0
 
Total number of neighbors 2
 
Total number of Established sessions 2
R1#
 
 
R1#show bgp neighbors
BGP neighbor is 2.2.2.2, remote AS 200, local AS 200, internal link
Member of peer-group ABC for session parameters
BGP version 4, local router ID 10.12.65.126, remote router ID 10.12.65.123
BGP state = Established, up for 00:01:05
Last read 00:00:14, hold time is 90, keepalive interval is 30 seconds
Neighbor capabilities:
Route refresh: advertised and received (old and new)
Address family IPv4 Unicast: advertised and received
Address family IPv4 Labeled-Unicast: advertised and received
Received 16 messages, 2 notifications, 0 in queue
Sent 20 messages, 2 notifications, 0 in queue
Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds
For address family: IPv4 Unicast
BGP table version 11, neighbor version 11
Index 0, Offset 0, Mask 0x1
ABC peer-group member
Community attribute sent to this neighbor (both)
0 accepted prefixes
2 announced prefixes
 
For address family: IPv4 Labeled-Unicast
BGP table version 1, neighbor version 1
Index 2, Offset 0, Mask 0x4
ABC peer-group member
Route-Reflector Client
Community attribute sent to this neighbor (both)
0 accepted prefixes
2 announced prefixes
 
Connections established 5; dropped 4
Local host: 2.2.2.1, Local port: 51667
Foreign host: 2.2.2.2, Foreign port: 179
Nexthop: 2.2.2.1
Nexthop global: ::
Nexthop local: ::
BGP connection: non shared network
Last Reset: 00:01:10, due to BGP Notification received
Notification Error Message: (Cease/Other Configuration Change.)
 
BGP neighbor is 3.3.3.3, remote AS 200, local AS 200, internal link
Member of peer-group ABC for session parameters
BGP version 4, local router ID 10.12.65.126, remote router ID 10.12.65.121
BGP state = Established, up for 00:00:09
Last read 00:00:10, hold time is 90, keepalive interval is 30 seconds
Neighbor capabilities:
Route refresh: advertised and received (old and new)
Address family IPv4 Unicast: advertised and received
Address family IPv4 Labeled-Unicast: advertised and received
Received 16 messages, 2 notifications, 0 in queue
Sent 20 messages, 2 notifications, 0 in queue
Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds
For address family: IPv4 Unicast
BGP table version 11, neighbor version 11
Index 1, Offset 0, Mask 0x2
ABC peer-group member
Community attribute sent to this neighbor (both)
0 accepted prefixes
2 announced prefixes
 
For address family: IPv4 Labeled-Unicast
BGP table version 1, neighbor version 1
Index 3, Offset 0, Mask 0x8
ABC peer-group member
Route-Reflector Client
Community attribute sent to this neighbor (both)
0 accepted prefixes
2 announced prefixes
 
Connections established 5; dropped 4
Local host: 3.3.3.1, Local port: 41732
Foreign host: 3.3.3.3, Foreign port: 179
Nexthop: 3.3.3.1
Nexthop global: ::
Nexthop local: ::
BGP connection: non shared network
Last Reset: 00:00:19, due to BGP Notification received
Notification Error Message: (Cease/Other Configuration Change.)
 
R1#
R2
 
R2#show ip bgp
BGP table version is 3, local router ID is 10.12.65.123
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
l - labeled, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
 
Network Next Hop Metric LocPrf Weight Path
*>il 1.1.1.1/32 2.2.2.1 0 100 0 i
* i 2.2.2.1 0 100 0 i
*>il 11.11.11.11/32 2.2.2.1 0 100 0 i
* i 2.2.2.1 0 100 0 i
 
Total number of prefixes 2
R2#
 
 
 
 
R2#show ip bgp 1.1.1.1/32
BGP routing table entry for 1.1.1.1/32
Paths: (2 available, best #1, table Default-IP-Routing-Table)
Not advertised to any peer
Local
2.2.2.1 from 2.2.2.1 (10.12.65.126)
Origin IGP, metric 0, localpref 100 valid, internal, best, source safi: 4
Last update: Tue Aug 25 10:01:05 2020
 
Local
2.2.2.1 from 2.2.2.1 (10.12.65.126)
Origin IGP, metric 0, localpref 100 valid, internal, source safi: 1
Last update: Tue Aug 25 10:01:05 2020
 
R2#
R2#show ip bgp 11.11.11.11/32
BGP routing table entry for 11.11.11.11/32
Paths: (2 available, best #1, table Default-IP-Routing-Table)
Not advertised to any peer
Local
2.2.2.1 from 2.2.2.1 (10.12.65.126)
Origin IGP, metric 0, localpref 100 valid, internal, best, source safi: 4
Last update: Tue Aug 25 10:01:05 2020
 
Local
2.2.2.1 from 2.2.2.1 (10.12.65.126)
Origin IGP, metric 0, localpref 100 valid, internal, source safi: 1
Last update: Tue Aug 25 10:01:05 2020
 
R2#
 
 
R2#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*>i 1.1.1.1/32 2.2.2.1 - 24320
*>i 11.11.11.11/32 2.2.2.1 - 24321
R2#
 
R3
 
R3#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*>i 1.1.1.1/32 3.3.3.1 - 24320
*>i 11.11.11.11/32 3.3.3.1 - 24321
R3#
 
Peer group members inherit the properties of Outbound Policies configured for Peer-group under Address-family ipv4 Labeled-Unicast
R1
 
#configure terminal
Enter configure mode.
(config)# ip access-list permit-1
Configure access-list to permit 1.1.1.1/32
(config-ip-acl)# permit any 1.1.1.1/32 any
Configure a permit statement in the acl to permit 1.1.1.1/32
(config-ip-acl)#exit
Exit ip access-list mode
(config)# route-map permit-only-1
Configure route-map
(config-route-map)# match ip address permit- 1
Configure a match statement in the route-map to match the access-list permit-1
(config-route-map)#exit
Exit route-map mode
(config)#router bgp 200
Define the routing process. The number 200 specifies the AS number of R1.
(config-router)#no allocate-label all
Unconfiguring allocate label all
config-router)# allocate-label route-map permit-only-1
Allocate labels to the route map
(config-router)#address-family ipv4 labeled- unicast
Enter address-family ipv4 labeled-unicast mode
(config-router-af)# neighbor ABC route-map permit-only-1 out
Configure the peer-group ABC with route-map in the outbound direction
(config-router-af)#exit
Exit address-family mode
(config-router)#exit
Exit router bgp mode
(config# exit
Exit configure terminal mode
#clear ip bgp peer-group ABC ipv4 labeled- unicast soft out
Do outbound soft reset for the peer-group ABC for the policy to take affect for the labelled-unicast peer-group members
Validation
R1
R1#show bgp neighbors
BGP neighbor is 2.2.2.2, remote AS 200, local AS 200, internal link
Member of peer-group ABC for session parameters
BGP version 4, local router ID 10.12.65.126, remote router ID 10.12.65.123
BGP state = Established, up for 00:14:24
Last read 00:00:22, hold time is 90, keepalive interval is 30 seconds
Neighbor capabilities:
Route refresh: advertised and received (old and new)
Address family IPv4 Unicast: advertised and received
Address family IPv4 Labeled-Unicast: advertised and received
Received 46 messages, 2 notifications, 0 in queue
Sent 53 messages, 2 notifications, 0 in queue
Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds
For address family: IPv4 Unicast
BGP table version 11, neighbor version 11
Index 0, Offset 0, Mask 0x1
ABC peer-group member
Community attribute sent to this neighbor (both)
0 accepted prefixes
2 announced prefixes
 
For address family: IPv4 Labeled-Unicast
BGP table version 1, neighbor version 1
Index 2, Offset 0, Mask 0x4
ABC peer-group member
Route-Reflector Client
Community attribute sent to this neighbor (both)
Outbound path policy configured
Route map for outgoing advertisements is *permit-only-1
0 accepted prefixes
1 announced prefixes
 
Connections established 5; dropped 4
Local host: 2.2.2.1, Local port: 51667
Foreign host: 2.2.2.2, Foreign port: 179
Nexthop: 2.2.2.1
Nexthop global: ::
Nexthop local: ::
BGP connection: non shared network
Last Reset: 00:14:29, due to BGP Notification received
Notification Error Message: (Cease/Other Configuration Change.)
 
BGP neighbor is 3.3.3.3, remote AS 200, local AS 200, internal link
Member of peer-group ABC for session parameters
BGP version 4, local router ID 10.12.65.126, remote router ID 10.12.65.121
BGP state = Established, up for 00:13:28
Last read 00:00:21, hold time is 90, keepalive interval is 30 seconds
Neighbor capabilities:
Route refresh: advertised and received (old and new)
Address family IPv4 Unicast: advertised and received
Address family IPv4 Labeled-Unicast: advertised and received
Received 47 messages, 2 notifications, 0 in queue
Sent 53 messages, 2 notifications, 0 in queue
Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds
For address family: IPv4 Unicast
BGP table version 11, neighbor version 11
Index 1, Offset 0, Mask 0x2
ABC peer-group member
Community attribute sent to this neighbor (both)
0 accepted prefixes
2 announced prefixes
 
For address family: IPv4 Labeled-Unicast
BGP table version 1, neighbor version 1
Index 3, Offset 0, Mask 0x8
ABC peer-group member
Route-Reflector Client
Community attribute sent to this neighbor (both)
Outbound path policy configured
Route map for outgoing advertisements is *permit-only-1
0 accepted prefixes
1 announced prefixes
 
Connections established 5; dropped 4
Local host: 3.3.3.1, Local port: 41732
Foreign host: 3.3.3.3, Foreign port: 179
Nexthop: 3.3.3.1
Nexthop global: ::
Nexthop local: ::
BGP connection: non shared network
Last Reset: 00:13:38, due to BGP Notification received
Notification Error Message: (Cease/Other Configuration Change.)
 
R1#
R2
R2#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*>i 1.1.1.1/32 2.2.2.1 - 24320
R2#
R3
R3#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*>i 1.1.1.1/32 3.3.3.1 - 24320
R3#
 
Peer-group-members inherit the properties of Inbound Policies configured for Peer-group under Address-family ipv4 Labeled-Unicast
Follow the configuration of R1,R2,R3 in the previous section with the following configuration
R2
 
#configure terminal
Enter configure mode.
(config)# interface lo
Enter interface mode for Loopback interface
(config-if)#ip address 100.1.1.1/24 secondary
Configure IP address for Loopback interaface
(config-if)#interface eth3
Enter interface mode for interface eth3
(config-if)#ip address 22.1.1.1/24
Configure IP address for interface eth3
(config-if)#exit
Exit interface mode
(config)#router bgp 200
Enter router bgp mode
(config-router)#address-family ipv4 unicast
Enter address-family ipv4 unicast mode
(config-router-af)#network 22.1.1.0/24
Advertise the network of eth3 in BGP
(config-router-af)#network 100.1.1.0/24
Advertise the network of Loopback in BGP
(config-router-af)#exit-address-family
Exit address-family mode
(config-router)#allocate-label all
Allocate labels for all IPv4 prefixes advertised
(config-router)#exit
Exit router bgp mode
R3
 
#configure terminal
Enter configure mode.
(config)# interface lo
Enter interface mode for Loopback interface
(config-if)#ip address 100.1.1.2/24 secondary
Configure IP address for Loopback interaface
(config-if)#interface eth3
Enter interface mode for interface eth3
(config-if)#ip address 22.1.1.2/24
Configure IP address for interface eth3
(config-if)#exit
Exit interface mode
(config)#router bgp 200
Enter router bgp mode
(config-router)#address-family ipv4 unicast
Enter address-family ipv4 unicast mode
(config-router-af)#network 22.1.1.0/24
Advertise the network of eth3 in BGP
(config-router-af)#network 100.1.1.0/24
Advertise the network of Loopback in BGP
(config-router-af)#exit-address-family
Exit address-family mode
(config-router)#allocate-label all
Allocate labels for all IPv4 prefixes advertised
(config-router)#exit
Exit router bgp mode
R1
 
#configure terminal
Enter configure mode.
(config)#ip access-list permit-22
Configure access-list to permit 22.1.1.0/24
(config-ip-acl)# permit any 22.1.1.0/24 any
Configure a permit statement to permit 22.1.1.0/24
(config-ip-acl)#exit
Exit ip access-list mode
(config)#route-map permit-only-22
Configure route-map
(config-route-map)#match ip address permit- 22
Configure match statement in route-map to match the access- list permit-22
(config-route-map)#exit
Exit route-map mode
(config)#router bgp 200
Enter BGP router mode
(config-router)#address-family ipv4 labeled- unicast
Enter the address-family ipv4 labeled-unicast mode
(config-router-af)#neighbor ABC route-map permit-only-22 in
Configure the peer-group ABC with route-map in the inbound direction under address-family ipv4 labeled-unicast
(config-router-af)# neighbor ABC activate
Activate PEER-GROUP in the address family
(config-router-af)#exit-address-family
Exit address-family ipv4 labeled-unicast mode
(config-router)#exit
Exit router bgp mode
(config)# exit
Exit configure terminal mode
#clear ip bgp peer-group ABC ipv4 labeled- unicast soft in
Do inbound soft reset for the peer-group ABC for the policy to take affect for the labelled-unicast peer-group members
Validation
R1
R1#show ip bgp labeled-unicast
 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S - stale
Network Next Hop In Label Out Label
*> 1.1.1.1/32 0.0.0.0 24320 -
*> 11.11.11.11/32 0.0.0.0 24321 -
*>i 22.1.1.0/24 3.3.3.3 24322 24320
* i 2.2.2.2 - 24320
*>i 100.1.1.0/24 3.3.3.3 24323 -
R1#
 
 
R1#show bgp neighbors
BGP neighbor is 2.2.2.2, remote AS 200, local AS 200, internal link
Member of peer-group ABC for session parameters
BGP version 4, local router ID 10.12.65.126, remote router ID 10.12.65.123
BGP state = Established, up for 00:45:38
Last read 00:00:03, hold time is 90, keepalive interval is 30 seconds
Neighbor capabilities:
Route refresh: advertised and received (old and new)
Address family IPv4 Unicast: advertised and received
Address family IPv4 Labeled-Unicast: advertised and received
Received 123 messages, 2 notifications, 0 in queue
Sent 126 messages, 2 notifications, 0 in queue
Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds
For address family: IPv4 Unicast
BGP table version 14, neighbor version 14
Index 0, Offset 0, Mask 0x1
ABC peer-group member
Community attribute sent to this neighbor (both)
2 accepted prefixes
2 announced prefixes
 
For address family: IPv4 Labeled-Unicast
BGP table version 3, neighbor version 3
Index 2, Offset 0, Mask 0x4
ABC peer-group member
Route-Reflector Client
Community attribute sent to this neighbor (both)
Inbound path policy configured
Outbound path policy configured
Route map for incoming advertisements is *permit-only-22
Route map for outgoing advertisements is *permit-only-1
1 accepted prefixes
1 announced prefixes
 
Connections established 5; dropped 4
Local host: 2.2.2.1, Local port: 51667
Foreign host: 2.2.2.2, Foreign port: 179
Nexthop: 2.2.2.1
Nexthop global: ::
Nexthop local: ::
BGP connection: non shared network
Last Reset: 00:45:43, due to BGP Notification received
Notification Error Message: (Cease/Other Configuration Change.)
 
BGP neighbor is 3.3.3.3, remote AS 200, local AS 200, internal link
Member of peer-group ABC for session parameters
BGP version 4, local router ID 10.12.65.126, remote router ID 10.12.65.121
BGP state = Established, up for 00:44:42
Last read 00:00:22, hold time is 90, keepalive interval is 30 seconds
Neighbor capabilities:
Route refresh: advertised and received (old and new)
Address family IPv4 Unicast: advertised and received
Address family IPv4 Labeled-Unicast: advertised and received
Received 124 messages, 2 notifications, 0 in queue
Sent 127 messages, 2 notifications, 0 in queue
Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 5 seconds
For address family: IPv4 Unicast
BGP table version 14, neighbor version 14
Index 1, Offset 0, Mask 0x2
ABC peer-group member
Community attribute sent to this neighbor (both)
2 accepted prefixes
2 announced prefixes
 
For address family: IPv4 Labeled-Unicast
BGP table version 3, neighbor version 3
Index 3, Offset 0, Mask 0x8
ABC peer-group member
Route-Reflector Client
Community attribute sent to this neighbor (both)
Inbound path policy configured
Outbound path policy configured
Route map for incoming advertisements is *permit-only-22
Route map for outgoing advertisements is *permit-only-1
1 accepted prefixes
1 announced prefixes
 
Connections established 5; dropped 4
Local host: 3.3.3.1, Local port: 41732
Foreign host: 3.3.3.3, Foreign port: 179
Nexthop: 3.3.3.1
Nexthop global: ::
Nexthop local: ::
BGP connection: non shared network
Last Reset: 00:44:52, due to BGP Notification received
Notification Error Message: (Cease/Other Configuration Change.)
 
R1#