6PE Configuration
This chapter explains about IPv6 islands over IPv4 MPLS using IPv6 Provider Edge Routers (6PE). With this technique, IPv6 islands are connected to each other across an IPv4 backbone enabled with MPLS label stacking while MP-BGP is used to announce the IPv6 routes across these MPLS tunnels. This feature can be implemented with label- switched paths (LSPs) using the Label Distribution Protocol (LDP) or Resource Reservation Protocol (RSVP).
This feature offers the following options to the service providers:
• Connect to other IPv6 networks accessible across the MPLS core.
• Provide access to IPv6 services and resources that service provider provides.
• Provide IPv6 VPN services without going for complete overhaul of existing MPLS/IPv4 core.
The 6PE uses the existing IPv4 MPLS core infrastructure for IPv6 transport. It enables IPv6 sites to communicate with each other over an IPv4 MPLS core network using MPLS label switched paths (LSPs). This feature relies heavily on multiprotocol Border Gateway Protocol (BGP) extensions in the IPv4 network configuration on the provider edge (PE) router to exchange IPv6 reachability information (in addition to an MPLS label) for each IPv6 address prefix. Edge routers are configured as dual-stack, running both IPv4 and IPv6, and use the IPv4 mapped IPv6 address for IPv6 prefix reachability exchange.
Benefits of 6PE
6PE offers the following benefits to service providers:
• Minimal operational cost and risk - No impact on existing IPv4 and MPLS services.
• Only provider edge routers require upgrade - A 6PE router can be an existing PE router or a new one dedicated to IPv6 traffic.
• No impact on IPv6 customer edge (CE) routers - The ISP can connect to any CE router running Static, IGP or EGP.
• Production services ready - An ISP can delegate IPv6 prefixes.
• IPv6 introduction into an existing MPLS service - 6PE routers can be added at any time.
IPv6 on Provider Edge Routers
The 6PE is a technique that provides global IPv6 reachability over IPv4 MPLS. It allows one shared routing table for all other devices. 6PE allows IPv6 domains to communicate with one another over the IPv4 without an explicit tunnel setup, requiring only one IPv4 address per IPv6 domain. While implementing 6PE, the provider edge routers are upgraded to support 6PE, while the rest of the core network is not touched (IPv6 unaware).
This implementation requires no re-configuration of core routers because forwarding is based on labels rather than on the IP header itself. This provides a cost-effective strategy for deploying IPv6.The IPv6 reachability information is exchanged by PE routers using multi-protocol Border Gateway Protocol (mp-iBGP) extensions. 6PE relies on mp-iBGP extensions in the IPv4 network configuration on the PE router to exchange IPv6 reachability information in addition to an MPLS label for each IPv6 address prefix to be advertised. PE routers are configured as dual stacks, running both IPv4 and IPv6, and use the IPv4 mapped IPv6 address for IPv6 prefix reachability exchange. The next hop advertised by the PE router for 6PE prefixes is still the IPv4 address that is used for IPv4 L3 VPN routes.
The following figure illustrates the 6PE topology.
Topology
As shown in Figure 6-7:
• CE1 and CE2 are customer edge routers
• 6PE1 and 6PE2 are IPv6 Provider Edge routers
• P is the router at the core of the IPv4 MPLS provider network
6PE Configuration
Configuration
CE1
#configure terminal | Enter the configure mode |
(config)#interface lo | Enter the interface mode |
(config-if)#ip address 44.44.44.44/32 secondary | Assign the IPv4 address |
(config-if)#exit | Exit the interface mode |
(config)#interface xe1 | Enter the interface mode |
(config-if)#ipv6 address 2001::2/64 | Assign the IPv6 address |
(config-if)#exit | Exit interface mode |
(config)#router bgp 200 | Enter router BGP mode |
(config-router)#bgp router-id 44.44.44.44 | Assign router ID |
(config-router)#neighbor 2001::1 remote-as 100 | Configure 6PE1 as an eBGP4+ neighbor |
(config-router)#address-family ipv6 unicast | Enter Address-Family IPv6 unicast mode |
(config-router-af)#redistribute static | Redistribute static routes |
(config-router-af)# neighbor 2001::1 activate | Activate the neighbor in the IPv6 address family |
(config-router-af)# exit-address-family | Exit the address family |
(config-router)#exit | Exit BGP router mode |
(config)#ipv6 route 2ffe::/64 xe1 | Configure IPV6 static route |
CE2
#configure terminal | Enter the configure mode |
(config)#interface lo | Enter the interface mode |
(config-if)#ip address 66.66.66.66/32 secondary | Assign the IPv4 address |
(config-if)#exit | Exit the interface mode |
(config)#interface xe1 | Enter the Interface mode |
(config-if)#ipv6 address 3002::2/64 | Assign IPv6 address |
(config-if)#exit | Exit the interface mode |
(config)#router bgp 300 | Enter BGP configure mode |
(config-router)#bgp router-id 66.66.66.66 | Assign router ID |
(config-router)# neighbor 3002::1 remote-as 100 | Configure 6PE2 as an eBGP4+ neighbor. |
(config-router)#address-family ipv6 unicast | Enter Address-Family IPv6 unicast mode |
(config-router-af)#redistribute static | Redistribute static routes |
(config-router-af)# neighbor 3002::1 activate | Activate the neighbor in the IPv6 address family. |
(config-router-af)# exit-address-family | Exit the address family |
(config-router)#exit | Exit BGP router mode |
(config)#ipv6 route 3ffe::/64 xe1 | Configure IPV6 static route |
PE1
#configure terminal | Enter the configure mode |
(config)#interface xe1 | Enter the Interface mode |
(config-if)#ipv6 address 2001::1/64 | Assign IPv6 address |
(config-if)#exit | Exit the interface mode |
(config)#interface lo | Enter the Interface mode |
(config-if)#ip address 1.1.1.1/32 secondary | Assign the IP address to loopback interface |
(config-if)#exit | Exit the interface mode. |
(config)#router ldp | Enter the router LDP mode. |
(config-router)#router-id 1.1.1.1 | Configure router-id |
(config-router)#explicit-null | Configure explicit-null. |
(config-router)#router-id 1.1.1.1 | Configure router-id |
(config-router)# transport-address ipv4 1.1.1.1 | Configure transport address as loopback address |
(config-router)#targeted-peer ipv4 3.3.3.3 | Configure targeted peer |
(config-router-targeted-peer)#exit | Exit targeted peer mode |
(config-router)#exit | Exit LDP mode |
(config)#interface xe2 | Enter Interface mode |
(config-if)# ip address 20.1.1.1/24 | Assign IPv4 address |
(config-if)#label-switching | Enable label switching in interface. |
(config-if)#enable-ldp ipv4 | Enable LDP in interface. |
(config-if)#exit | Exit the interface mode |
(config)#router ospf | Enter the router OSPF mode |
(config-router)#ospf router-id 1.1.1.1 | Configure OSPF router id same as loopback IP address |
(config-router)#network 1.1.1.1/32 area 0 (config-router)#network 20.1.1.0/24 area 0 | Define the network on which OSPF runs and associate area id |
(config-router)#exit | Exit from router OSPF mode. |
(config)#mpls label mode 6pe per-prefix | Change label mode to per-prefix, default is per VRF |
(config)#router bgp 100 | Enter BGP Configure mode |
(config-router)# bgp router-id 1.1.1.1 | Configure BGP router-id |
(config-router)#neighbor 3.3.3.3 remote-as 100 | Configure 6PE2 as an iBGP peer |
(config-router)#neighbor 3.3.3.3 update-source lo | Update the source as loopback for iBGP peering with the remote 6PE router |
(config-router)#neighbor 2001::2 remote-as 200 | Configure CE1 as eBGP peer |
(config-router)#address-family ipv4 unicast | Enter the address family mode |
(config-router-af)#neighbor 3.3.3.3 activate | Activate neighbor |
(config-router-af)#exit | Exit the address family mode |
(config-router)#address-family ipv6 labeled- unicast | Enter IPv6 labeled-unicast Address Family mode |
(config-router-af)#neighbor 3.3.3.3 activate | Activate the 6PE neighbor |
(config-router-af)#exit-address-family | Exit IPv6 LU Address Family mode |
(config-router)#address-family ipv6 unicast | Enter the IPv6 address family |
(config-router-af)#neighbor 2001::2 activate | Activate CE inside IPv6 address family |
(config-router-af)#redistribute connected | Redistribute the connected routes |
(config-router-af)#exit-address-family | Exit IPv6 Address Family mode. |
(config-router)#exit | Exit Router mode |
P1
#configure terminal | Enter the configure mode. |
(config)#interface lo | Enter the interface mode |
(config-if)#ip address 2.2.2.2/32 secondary | Assign the IP address to loopback interface |
(config-if)#exit | Exit the interface mode |
(config)#router ldp | Enter the router ldp mode. |
(config-router)#router-id 2.2.2.2 | Configure the router-id |
(config-router)#exit | Exit therouter LDP mode |
(config)#router ospf | Enter router OSPF mode |
(config-router)#ospf router-id 2.2.2.2 | Configure OSPF router id same as loopback IP address. |
(config-router)#transport-address ipv4 2.2.2.2 | Configure transport address as loopback address |
(config-router)#network 2.2.2.2/32 area 0 (config-router)#network 20.1.1.2/24 area 0 (config-router)#network 30.1.1.1/24 area 0 | Define the network on which OSPF runs and associate area id |
(config-router)#exit | Exit from router OSPF mode |
(config)#interface xe1 | Enter the Interface mode |
(config-if)# ip address 30.1.1.1/24 | Assign IPv4 address |
(config-if)#label-switching | Enable label switching in interface. |
(config-if)#enable-ldp ipv4 | Enable LDP in interface |
(config-if)#exit | Exit the interface mode |
(config)#interface xe2 | Enter the Interface mode |
(config-if)# ip address 20.1.1.2/24 | Assign IPv4 address |
(config-if)#label-switching | Enable label switching in interface |
(config-if)#enable-ldp ipv4 | Enable LDP in interface |
(config-if)#exit | Exit the interface mode |
PE2
#configure terminal | Enter the configure mode |
(config)#interface xe2 | Enter the Interface mode |
(config-if)#ipv6 address 3002::1/64 | Assign IPv6 address |
(config-if)#exit | Exit the interface mode |
(config)#interface lo | Enter the Interface mode |
(config-if)#ip address 3.3.3.3/32 secondary | Assign the IP address to loopback interface |
(config-if)#exit | Exit the interface mode |
(config)#router ldp | Enter the router ldp mode |
(config-router)#router-id 3.3.3.3 | Configure the router-id |
(config-router)#transport-address ipv4 3.3.3.3 | Configure transport address as loopback address |
(config-router)#targeted-peer ipv4 1.1.1.1 | Configure the targeted peer |
(config-router-targeted-peer)#exit | Exit targeted peer mode |
(config-router)#explicit-null | Configure explicit-null |
(config-router)#exit | Exit the LDP mode |
(config)#interface xe1 | Enter the Interface mode |
(config-if)# ip address 30.1.1.2/24 | Assign IPv4 address |
(config-if)#label-switching | Enable label switching in interface |
(config-if)#enable-ldp ipv4 | Enable LDP in interface |
(config-if)#exit | Exit the interface mode |
(config)#mpls label mode 6pe per-prefix | Change label mode to per-prefix, default is per VRF |
(config)#router bgp 100 | Enter router BGP mode |
(config-router)#bgp router-id 3.3.3.3 | Configure BGP router id |
(config-router)#neighbor 1.1.1.1 remote-as 100 | Configure 6VPE2 as an iBGP peer. |
(config-router)#neighbor 1.1.1.1 update-source lo | Update the source as loopback for iBGP peering with the remote 6VPE router |
(config-router)#address-family ipv4 unicast | Enter address family mode |
(config-router-af)#neighbor 1.1.1.1 activate | Activate neighbor |
(config-router-af)#exit | Exit address family mode |
(config-router)#neighbor 3002::2 remote-as 300 | Configure CE1 as eBGP peer |
(config-router)#address-family ipv6 labeled- unicast | Enter IPv6 labeled-unicast Address Family mode. |
(config-router-af)#neighbor 1.1.1.1 activate | Activate the 6PE neighbor |
(config-router-af)#exit-address-family | Exit IPv6 LU Address Family mode. |
(config-router)#address-family ipv6 unicast | Enter the IPv6 address family |
(config-router-af)#neighbor 3002::2 activate | Activate CE inside IPv6 address family |
(config-router-af)#redistribute connected | Redistribute the connected routes |
(config-router-af)#exit-address-family | Exit IPv6 Address Family mode |
(config-router)#exit | Exit router mode |
(config)#router ospf | Enter OSPF router mode |
(config-router)#network 3.3.3.3/32 area 0 | Enable OSPF with specified area ID on interfaces with IP address that matches the specified network address |
(config-router)#network 30.1.1.0/24 area 0 | Enable OSPF with specified area ID on interfaces with IP address that matches the specified network address |
(config-router)#exit | Exit OSPF router mode |
Validation
CE1
CE1#show ipv6 route
IPv6 Routing Table
Codes: K - kernel route, C - connected, S - static, D- DHCP, R - RIP,
O - OSPF, IA - OSPF inter area, E1 - OSPF external type 1,
E2 - OSPF external type 2, E - EVPN N1 - OSPF NSSA external type 1,
N2 - OSPF NSSA external type 2, i - IS-IS, B - BGP,
v - vrf leaked
Timers: Uptime
IP Route Table for VRF "default"
C ::1/128 via ::, lo, 01:10:32
C 2001::/64 via ::, eth1, 00:46:49
S 2ffe::/64 [1/0] via ::, xe1, 00:35:20
B 3002::/64 [20/0] via fe80::5054:ff:fe29:189d, xe1, 00:02:12
B 3ffe::/64 [20/0] via fe80::5054:ff:fe29:189d, xe1, 00:02:36
C fe80::/64 via ::, xe3, 01:10:32
#
CE1#show ipv6 bgp summary
BGP router identifier 44.44.44.44, local AS number 200
BGP table version is 8
3 BGP AS-PATH entries
0 BGP community entries
Neighbor V AS MsgRcv MsgSen TblVer InQ OutQ Up/Down State/PfxRcd
2001::1 4 100 80 83 8 0 0 00:01:45 3
Total number of neighbors 1
Total number of Established sessions 1
PE1
PE1#show ipv6 route
IPv6 Routing Table
Codes: K - kernel route, C - connected, S - static, D- DHCP, R - RIP,
O - OSPF, IA - OSPF inter area, E1 - OSPF external type 1,
E2 - OSPF external type 2, E - EVPN N1 - OSPF NSSA external type 1,
N2 - OSPF NSSA external type 2, i - IS-IS, B - BGP,
v - vrf leaked
Timers: Uptime
IP Route Table for VRF "default"
C ::1/128 via ::, lo, 01:17:11
C 2001::/64 via ::, xe1, 00:40:22
B 2ffe::/64 [20/0] via fe80::5054:ff:fe60:f4e5, eth1, 00:02:37
B 3002::/64 [200/0] via ::ffff:3.3.3.3, 00:03:10
B 3ffe::/64 [200/0] via ::ffff:3.3.3.3, 00:01:07
C fe80::/64 via ::, xe2, 01:17:11
PE1#show ldp session
Peer IP Address IF Name My Role State KeepAlive UpTime
2.2.2.2 xe2 Passive OPERATIONAL 30 00:06:59
PE1#show bgp ipv6
BGP table version is 5, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, a add-path, * valid, > best, i - internal,
l - labeled, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> l 2001::/64 :: 0 100 32768 ?
*> l 2ffe::/64 2001::2(fe80::5054:ff:fe60:f4e5)
0 100 0 200 ?
*>i 3002::/64 ::ffff:3.3.3.3 0 100 0 ?
*>i 3ffe::/64 ::ffff:3.3.3.3 0 100 0 300 ?
Total number of prefixes 4
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 Out-Label Out-Intf ELC Nexthop
L> 2.2.2.2/32 3 3 - - LSP_DEFAULT 3 xe2 No 20.1.1.2
L> 3.3.3.3/32 4 4 - - LSP_DEFAULT 24321 xe2 No 20.1.1.2
L> 30.1.1.0/24 5 3 - - LSP_DEFAULT 3 xe2 No 20.1.1.2
B> 3002::/64 2 2 0 Yes LSP_DEFAULT 24960 - No 3.3.3.3
B> 3ffe::/64 1 1 0 Yes LSP_DEFAULT 24961 - No 3.3.3.3
PE1#show ldp session
Peer IP Address IF Name My Role State KeepAlive UpTime
30.1.1.1 ce46 Passive OPERATIONAL 30 00:10:11
PE1#show mpls ftn-table
Primary FTN entry with FEC: 2.2.2.2/32, id: 3, row status: Active, Tunnel-Policy: N/A
Owner: LDP, 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
Matched bytes:0, pkts:0, TX bytes:0, Pushed pkts:0
Cross connect ix: 4, in intf: - in label: 0 out-segment ix: 3
Owner: N/A, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 3, owner: N/A, Stale: NO, out intf: xe2, out label: 3
Nexthop addr: 20.1.1.2 cross connect ix: 4, op code: Push
Primary FTN entry with FEC: 3.3.3.3/32, id: 4, row status: Active, Tunnel-Policy: N/A
Owner: LDP, 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
Matched bytes:0, pkts:0, TX bytes:0, Pushed pkts:0
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, Stale: NO, out intf: xe2, out label: 24321
Nexthop addr: 20.1.1.2 cross connect ix: 5, op code: Push
Primary FTN entry with FEC: 30.1.1.0/24, id: 5, row status: Active, Tunnel-Policy: N/A
Owner: LDP, 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
Matched bytes:0, pkts:0, TX bytes:0, Pushed pkts:0
Cross connect ix: 4, in intf: - in label: 0 out-segment ix: 3
Owner: N/A, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 3, owner: N/A, Stale: NO, out intf: xe2, out label: 3
Nexthop addr: 20.1.1.2 cross connect ix: 4, op code: Push
Primary FTN entry with FEC: 3002::/64, id: 2, 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
Matched bytes:0, pkts:0, TX bytes:0, Pushed pkts:0
Cross connect ix: 2, 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: xe2, transport out intf: xe2, out label: 24960
Nexthop addr: 3.3.3.3 cross connect ix: 2, op code: Push and Lookup
Primary FTN entry with FEC: 3ffe::/64, 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
Matched bytes:0, pkts:0, TX bytes:0, Pushed pkts: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, BGP out intf: xe2, transport out intf: xe2, out label: 24961
Nexthop addr: 3.3.3.3 cross connect ix: 1, op code: Push and Lookup
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> 2001::/64 3 24960 Nolabel N/A N/A 127.0.0.1 LSP_DEFAULT
B> 2ffe::/64 4 24961 Nolabel N/A N/A 127.0.0.1 LSP_DEFAULT
#
PE1#show ip bgp summary
BGP router identifier 1.1.1.1, local AS number 100
BGP table version is 1
3 BGP AS-PATH entries
0 BGP community entries
Neighbor V AS MsgRcv MsgSen TblVer InQ OutQ Up/Down State/PfxRcd
3.3.3.3 4 100 42 43 1 0 0 00:08:40 0
Total number of neighbors 1
Total number of Established sessions 1
PE1#sh ipv6 bgp summary
BGP router identifier 1.1.1.1, local AS number 100
BGP table version is 5
3 BGP AS-PATH entries
0 BGP community entries
Neighbor V AS MsgRcv MsgSen TblVer InQ OutQ Up/Down State/PfxRcd
2001::2 4 200 93 98 5 0 0 00:08:33 1
Total number of neighbors 1
Total number of Established sessions 1
PE1#sh ip bgp neighbors
BGP neighbor is 3.3.3.3, remote AS 100, local AS 100, internal link
BGP version 4, local router ID 1.1.1.1, remote router ID 3.3.3.3
BGP state = Established, up for 00:08:55
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 IPv6 Labeled Unicast: advertised and received
Received 42 messages, 0 notifications, 0 in queue
Sent 43 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 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
0 accepted prefixes
0 announced prefixes
For address family: IPv6 Labeled-Unicast
BGP table version 6, neighbor version 6
Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
2 accepted prefixes
2 announced prefixes
Connections established 2; dropped 1
Local host: 1.1.1.1, Local port: 34293
Foreign host: 3.3.3.3, Foreign port: 179
Nexthop: 1.1.1.1
Nexthop global: ::
Nexthop local: ::
BGP connection: non shared network
Last Reset: 00:09:51, due to Administratively Reset (Cease Notification sent)
Notification Error Message: (Cease/Administratively Reset.)
BGP neighbor is 2001::2, remote AS 200, local AS 100, external link
BGP version 4, local router ID 1.1.1.1, remote router ID 44.44.44.44
BGP state = Established, up for 00:08:45
Last read 00:00:16, hold time is 90, keepalive interval is 30 seconds
Neighbor capabilities:
Route refresh: advertised and received (old and new)
Address family IPv6 Unicast: advertised and received
Received 92 messages, 1 notifications, 0 in queue
Sent 97 messages, 1 notifications, 0 in queue
Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 30 seconds
For address family: IPv6 Unicast
BGP table version 5, neighbor version 5
Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
1 accepted prefixes
3 announced prefixes
Connections established 3; dropped 2
Local host: 2001::1, Local port: 179
Foreign host: 2001::2, Foreign port: 40980
Nexthop: 1.1.1.1
Nexthop global: 2001::1
Nexthop local: fe80::5054:ff:fe29:189d
BGP connection: shared network
Last Reset: 00:08:50, due to BGP Notification received
Notification Error Message: (Cease/Other Configuration Change.)
P1
P1#show ldp session
Peer IP Address IF Name My Role State KeepAlive UpTime
3.3.3.3 xe1 Passive OPERATIONAL 30 00:10:11
1.1.1.1 xe2 Active OPERATIONAL 30 00:09:21
P1#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 Out-Label Out-Intf ELC Nexthop
L> 1.1.1.1/32 2 2 - - LSP_DEFAULT 0 xe2 No 20.1.1.1
L> 3.3.3.3/32 1 1 - - LSP_DEFAULT 0 xe1 No 30.1.1.2
P1#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
L> 3.3.3.3/32 2 24321 0 N/A xe1 30.1.1.2 LSP_DEFAULT
L> 1.1.1.1/32 1 24320 0 N/A xe2 20.1.1.1 LSP_DEFAULT
PE2
PE2#show ipv6 route
IPv6 Routing Table
Codes: K - kernel route, C - connected, S - static, D- DHCP, R - RIP,
O - OSPF, IA - OSPF inter area, E1 - OSPF external type 1,
E2 - OSPF external type 2, E - EVPN N1 - OSPF NSSA external type 1,
N2 - OSPF NSSA external type 2, i - IS-IS, B - BGP,
v - vrf leaked
Timers: Uptime
IP Route Table for VRF "default"
C ::1/128 via ::, lo, 01:24:48
B 2001::/64 [200/0] via ::ffff:1.1.1.1, 00:11:08
B 2ffe::/64 [200/0] via ::ffff:1.1.1.1, 00:10:34
C 3002::/64 via ::, xe2, 00:24:41
B 3ffe::/64 [20/0] via fe80::5054:ff:fef6:c35d, xe2, 00:09:07
C fe80::/64 via ::, xe3, 01:24:48
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> 3002::/64 3 24960 Nolabel N/A N/A 127.0.0.1 LSP_DEFAULT
B> 3ffe::/64 4 24961 Nolabel N/A N/A 127.0.0.1 LSP_DEFAULT
PE2#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 Out-Label Out-Intf ELC Nexthop
L> 1.1.1.1/32 3 2 - - LSP_DEFAULT 24320 eth1 No 30.1.1.1
L> 2.2.2.2/32 1 1 - - LSP_DEFAULT 3 xe1 No 30.1.1.1
L> 20.1.1.0/24 2 1 - - LSP_DEFAULT 3 xe1 No 30.1.1.1
B> 2001::/64 4 3 0 Yes LSP_DEFAULT 24960 - No 1.1.1.1
B> 2ffe::/64 5 4 0 Yes LSP_DEFAULT 24961 - No 1.1.1.1
PE2#show mpls ftn-table
Primary FTN entry with FEC: 1.1.1.1/32, id: 3, row status: Active, Tunnel-Policy: N/A
Owner: LDP, 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
Matched bytes:0, pkts:0, TX bytes:0, Pushed pkts:0
Cross connect ix: 3, 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, Stale: NO, out intf: eth1, out label: 24320
Nexthop addr: 30.1.1.1 cross connect ix: 3, op code: Push
Primary FTN entry with FEC: 2.2.2.2/32, id: 1, row status: Active, Tunnel-Policy: N/A
Owner: LDP, 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
Matched bytes:0, pkts:0, TX bytes:0, Pushed pkts:0
Cross connect ix: 2, in intf: - in label: 0 out-segment ix: 1
Owner: N/A, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 1, owner: N/A, Stale: NO, out intf: eth1, out label: 3
Nexthop addr: 30.1.1.1 cross connect ix: 2, op code: Push
Primary FTN entry with FEC: 20.1.1.0/24, id: 2, row status: Active, Tunnel-Policy: N/A
Owner: LDP, 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
Matched bytes:0, pkts:0, TX bytes:0, Pushed pkts:0
Cross connect ix: 2, in intf: - in label: 0 out-segment ix: 1
Owner: N/A, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 1, owner: N/A, Stale: NO, out intf: eth1, out label: 3
Nexthop addr: 30.1.1.1 cross connect ix: 2, op code: Push
Primary FTN entry with FEC: 2001::/64, id: 4, 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
Matched bytes:0, pkts:0, TX bytes:0, Pushed pkts:0
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, Stale: NO, BGP out intf: eth1, transport out intf: eth1, out label: 24960
Nexthop addr: 1.1.1.1 cross connect ix: 4, op code: Push and Lookup
Primary FTN entry with FEC: 2ffe::/64, id: 5, 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
Matched bytes:0, pkts:0, TX bytes:0, Pushed pkts:0
Cross connect ix: 5, in intf: - in label: 0 out-segment ix: 4
Owner: BGP, Persistent: No, Admin Status: Up, Oper Status: Up
Out-segment with ix: 4, owner: BGP, Stale: NO, BGP out intf: eth1, transport out intf: eth1, out label: 24961
Nexthop addr: 1.1.1.1 cross connect ix: 5, op code: Push and Lookup
PE2# show ldp session
Peer IP Address IF Name My Role State KeepAlive UpTime
2.2.2.2 xe1 Active OPERATIONAL 30 00:12:01
PE2#show bgp ipv6
BGP table version is 5, local router ID is 3.3.3.3
Status codes: s suppressed, d damped, h history, a add-path, * valid, > best, i - internal,
l - labeled, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*>i 2001::/64 ::ffff:1.1.1.1 0 100 0 ?
*>i 2ffe::/64 ::ffff:1.1.1.1 0 100 0 200 ?
*> l 3002::/64 :: 0 100 32768 ?
*> l 3ffe::/64 3002::2(fe80::5054:ff:fef6:c35d)
0 100 0 300 ?
Total number of prefixes 4
PE2#show ip bgp neighbors
BGP neighbor is 1.1.1.1, remote AS 100, local AS 100, internal link
BGP version 4, local router ID 3.3.3.3, remote router ID 1.1.1.1
BGP state = Established, up for 00:11:54
Last read 00:00:06, 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 IPv6 Labeled Unicast: advertised and received
Received 50 messages, 0 notifications, 0 in queue
Sent 50 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 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
0 accepted prefixes
0 announced prefixes
For address family: IPv6 Labeled-Unicast
BGP table version 5, neighbor version 5
Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
2 accepted prefixes
2 announced prefixes
Connections established 2; dropped 1
Local host: 3.3.3.3, Local port: 179
Foreign host: 1.1.1.1, Foreign port: 34293
Nexthop: 3.3.3.3
Nexthop global: ::
Nexthop local: ::
BGP connection: non shared network
Last Reset: 00:12:28, due to Administratively Reset (Cease Notification sent)
Notification Error Message: (Cease/Administratively Reset.)
BGP neighbor is 3002::2, remote AS 300, local AS 100, external link
BGP version 4, local router ID 3.3.3.3, remote router ID 66.66.66.66
BGP state = Established, up for 00:10:17
Last read 00:00:25, hold time is 90, keepalive interval is 30 seconds
Neighbor capabilities:
Route refresh: advertised and received (old and new)
Address family IPv6 Unicast: advertised and received
Received 61 messages, 2 notifications, 0 in queue
Sent 68 messages, 2 notifications, 0 in queue
Route refresh request: received 0, sent 0
Minimum time between advertisement runs is 30 seconds
For address family: IPv6 Unicast
BGP table version 5, neighbor version 5
Index 1, Offset 0, Mask 0x2
Community attribute sent to this neighbor (both)
1 accepted prefixes
3 announced prefixes
Connections established 3; dropped 2
Local host: 3002::1, Local port: 52758
Foreign host: 3002::2, Foreign port: 179
Nexthop: 3.3.3.3
Nexthop global: 3002::1
Nexthop local: fe80::5054:ff:fe2b:8d4f
BGP connection: shared network
Last Reset: 00:10:22, due to BGP Notification received
Notification Error Message: (Cease/Other Configuration Change.)
PE2# show ip bgp summary
BGP router identifier 3.3.3.3, local AS number 100
BGP table version is 1
3 BGP AS-PATH entries
0 BGP community entries
Neighbor V AS MsgRcv MsgSen TblVer InQ OutQ Up/Down State/PfxRcd
1.1.1.1 4 100 50 52 1 0 0 00:12:06 0
Total number of neighbors 1
Total number of Established sessions 1
PE2#show ipv6 bgp summary
BGP router identifier 3.3.3.3, local AS number 100
BGP table version is 5
3 BGP AS-PATH entries
0 BGP community entries
Neighbor V AS MsgRcv MsgSen TblVer InQ OutQ Up/Down State/PfxRcd
3002::2 4 300 64 70 5 0 0 00:10:31 1
Total number of neighbors 1
Total number of Established sessions 1
CE2
CE2#show ipv6 bgp summary
BGP router identifier 66.66.66.66, local AS number 300
BGP table version is 9
3 BGP AS-PATH entries
0 BGP community entries
Neighbor V AS MsgRcv MsgSen TblVer InQ OutQ Up/Down State/PfxRcd
3002::1 4 100 70 67 9 0 0 00:11:35 3
Total number of neighbors 1
Total number of Established sessions 1
CE2#show ipv6 route
IPv6 Routing Table
Codes: K - kernel route, C - connected, S - static, D- DHCP, R - RIP,
O - OSPF, IA - OSPF inter area, E1 - OSPF external type 1,
E2 - OSPF external type 2, E - EVPN N1 - OSPF NSSA external type 1,
N2 - OSPF NSSA external type 2, i - IS-IS, B - BGP,
v - vrf leaked
Timers: Uptime
IP Route Table for VRF "default"
C ::1/128 via ::, lo, 01:26:48
B 2001::/64 [20/0] via fe80::5054:ff:fe2b:8d4f, xe2, 00:11:43
B 2ffe::/64 [20/0] via fe80::5054:ff:fe2b:8d4f, xe2, 00:11:43
C 3002::/64 via ::, xe2, 00:24:47
S 3ffe::/64 [1/0] via ::, xe2, 00:24:05
C fe80::/64 via ::, xe2, 01:26:48