BGP-VPLS Configuration
This chapter contains configurations for VPLS with Border Gateway Protocol Signaling.
Overview
Virtual Private LAN Service (VPLS) is a way to provide Ethernet-based multipoint-to-multipoint communication over IP/MPLS networks. It allows geographically-dispersed sites to share an Ethernet broadcast domain by connecting sites through pseudowires. A set of Kompella circuits is grouped by a common VPLS identifier to achieve this service objective.
A Pseudowire (PW) consists of a pair of point-to-point, single-hop unidirectional LSPs in opposite directions, each identified by a PW label, also called a Virtual Connection (VC) label.
The Border Gateway Protocol (BGP) is used to signaling VCs and for auto-discovery of neighbors. A service provider may use either LDP or RSVP-TE or add static provisioning to set up LSP tunnels to transport data through virtual circuits.
The VPLS identifier is exchanged with the labels, so that both PWs can be linked and associated with a particular VPLS instance.
Note: In Inter-AS, OcNOS accepts information from any other AS but the same VPN-ID/VPLS-ID ( *: VPLS-ID). OcNOS does not have explicit RD/RT (import/export) support for BGP VPLS. RD/RT are automatically generated based on the configured BGP AS number and VPN-ID/VPLS-ID as (AS-number: VPN-ID).
Topology
The diagram depicts the topology for the configuration examples that follow.
Sample Topology for VPLS with BGP Signaling
BGP-VPLS Configuration
PE-1
#configure terminal | Enter configuration mode. |
(config)#interface eth1 | Specify the interface (eth1) to be configured. |
(config-if)#ip address 10.10.1.1/24 | Set the IP address of the interface to 10.10.1.1/24. |
(config-if)#label-switching | Enable label switching on interface eth1. |
(config-if)#exit | Exit interface mode. |
(config)#interface lo | Specify the loopback address. |
(config-if)#ip address 1.1.1.1/32 | Set the IP address of the loopback interface to 1.1.1.1/32. |
(config-if)#exit | Exit interface mode |
(config)#mpls vpls v1 25 | Create an instance of VPLS, and switch to the VPLS command mode, by specifying the VPLS name (v1) and VPLS ID (25). |
(config-vpls)#vpls-mtu 1400 | Configure the MTU for the VPLS. (Default is 1500; range is <576 - 65535>. |
(config-vpls)#signaling bgp | Enter the Signaling bgp mode for BGP VPLS. |
(config-vpls-sig)#ve-id 1 | Configure VE ID, which is mandatory for BGP VPLS, otherwise, Signaling does not take place. VE ID should be unique per VPLS instance. |
(config-vpls-sig)#exit | Exit is a mandatory command for signaling BGP configuration to take affect. If exit is not given BGP signaling does not take place. |
(config-vpls)#exit | Exit VPLS mode. |
(config)#service-template v1 | Configure service template |
(config-svc)#match all | Configure the match condition |
(config-svc)#exit | Exit interface mode |
(config)#interface eth3 | Specify the interface (eth3) to be configured. |
(config-if)#switchport | Switch to Layer-2 mode. (VPLS can be bound only on the Layer-2 port.) |
(config-if)#mpls-vpls v1 service-template v1 | Bind the VPLS to the Access Interface. |
(config-if-vpls)#exit | Exit VPLS attachment-circuit mode |
(config-if)#exit | Exit interface mode. |
Note: VE IDs range is from 1 to 64. Administrator should configure the VE ID’s accordingly in their Network.
PE1 - LDP
#configure terminal | Enter configuration mode |
(config)#router ldp | Enter Router LDP mode. |
(config-router)#transport-address ipv4 1.1.1.1 | Configure the transport address for a label space by binding the address to a loopback address. |
(config-router)#exit | Exit Router mode. |
(config)#interface eth1 | Specify the interface (eth1) to be configured. |
(config-if)#enable-ldp ipv4 | Enable LDP on interface eth1. |
(config-if)#exit | Exit interface mode. |
PE1 - OSPF
#configure terminal | Enter configure mode |
(config)#router ospf 1 | Configure the OSPF routing process, and specify the process ID. |
(config-router)#network 10.10.1.0/24 area 0 | Define the interfaces on which OSPF runs, and specify the backbone area 0. |
(config-router)#network 1.1.1.1/32 area 0 | |
(config-router)#exit | Exit Router mode. |
PE1 - BGP
#configure terminal | Enter configuration mode. |
(config)#router bgp 100 | Enter BGP Configure mode. |
(config-router)#neighbor 2.2.2.2 remote-as 100 | Configure PE2 as an iBGP peer. |
(config-router)#neighbor 2.2.2.2 update-source lo | Update the source as loopback for iBGP peering with the remote PE2 router. |
(config-router)#neighbor 3.3.3.3 remote-as 100 | Configure PE3 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 PE3 router |
(config-router)#address-family l2vpn vpls | Configure address-family l2vpn vpls. |
(config-router-af)#neighbor 2.2.2.2 activate | Activate PE2 in the VPLS address family. |
(config-router-af)#neighbor 3.3.3.3 activate | Activate PE3 in the VPLS address family. |
PE2
#configure terminal | Enter configuration mode. |
(config)#interface eth3 | Specify the interface (eth3) to be configured. |
(config-if)#ip address 20.20.1.3/24 | Set the IP address of the interface to 20.20.1.3/24. |
(config-if)#label-switching | Enable label switching on interface eth3. |
(config-if)#exit | Exit interface mode. |
(config)#interface lo | Specify the loopback address. |
(config-if)#ip address 2.2.2.2/32 | Set the IP address of the loopback interface to 2.2.2.2/32. |
(config-if)#exit | Exit interface mode. |
(config)#mpls vpls v1 25 | Create an instance of VPLS, and switch to the VPLS command mode, by specifying the VPLS name (v1) and VPLS ID (25). |
(config-vpls)#vpls-mtu 1400 | Configure the MTU for the VPLS. (Default is 1500; range is <576 - 65535>.) |
(config-vpls)#signaling bgp | Enter the Signaling BGP mode for BGP VPLS. |
(config-vpls-sig)#ve-id 2 | Configure ve-id, which is mandatory for BGP VPLS. Without a ve-id Signaling does not take place. VE ID should be unique per VPLS instance. |
(config-vpls-sig)#exit | Exit is a mandatory command for signaling BGP configuration to take affect. If exit is done, BGP signaling does not take place. |
(config-vpls)#exit | Exit VPLS mode. |
(config)#service-template v1 | Configure service template |
(config-svc)#match all | Configure the match condition |
(config-svc)#exit | Exit interface mode |
(config)#interface eth1 | Specify the interface (eth1) to be configured. |
(config-if)#switchport | Switch to Layer-2 mode. (VPLS can only be bound on the Layer-2 port.) |
(config-if)#mpls-vpls service-template v1 | Bind the VPLS to the Access Interface. |
(config-if-vpls)#exit | Exit VPLS attachment-circuit mode |
(config-if)#exit | Exit interface mode. |
Note: VE ID’s range is from 1 to 64. Administrator should configure the VE ID’s accordingly in their Network.
PE2 - LDP
#configure terminal | Enter configuration mode |
(config)#router ldp | Enter Router LDP mode. |
(config-router)#transport-address ipv4 2.2.2.2 | Configure the transport address for a label space by binding the address to a loopback address. |
(config-router)#exit | Exit Router mode. |
(config)#interface eth3 | Specify the interface (eth3) to be configured. |
(config-if)#enable-ldp ipv4 | Enable LDP on the specified interface (eth3). |
(config-if)#exit | Exit interface mode. |
PE2 - OSPF
#configure terminal | Enter configuration mode. |
(config)#router ospf 1 | Configure the OSPF routing process, and specify the process ID. |
(config-router)#network 20.20.1.0/24 area 0 | Define the interfaces on which OSPF runs, and specify the backbone area 0. |
(config-router)#network 2.2.2.2/32 area 0 | |
(config-router)#exit | Exit Router mode. |
PE2 - BGP
#configure terminal | Enter configuration mode. |
(config)#router bgp 100 | Enter BGP router mode. |
(config-router)#neighbor 1.1.1.1 remote-as 100 | Configure PE1 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 PE1 router. |
(config-router)#neighbor 3.3.3.3 remote-as 100 | Configure PE3 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 PE3 router. |
(config-router)#address-family l2vpn vpls | Configure address-family l2vpn vpls. |
(config-router-af)#neighbor 1.1.1.1 activate | Activate PE1 in the VPLS address family. |
(config-router-af)#neighbor 3.3.3.3 activate | Activate PE3 in the VPLS address family. |
PE3
#configure terminal | Enter configuration mode. |
(config)#interface eth3 | Specify the interface (eth3)to be configured. |
(config-if)#ip address 40.40.1.5/24 | Set the IP address of the interface to 40.40.1.5/24. |
(config-if)#label-switching | Enable label switching on interface eth3. |
(config-if)#exit | Exit interface mode. |
(config)#interface lo | Specify the loopback address. |
(config-if)#ip address 3.3.3.3/32 | Set the IP address of the loopback interface to 3.3.3.3/32. |
(config-if)#exit | Exit interface mode. |
(config)#mpls vpls v1 25 | Create an instance of VPLS, and switch to the VPLS command mode, by indicating the VPLS name (v1) and VPLS ID (25). |
(config-vpls)#vpls-mtu 1400 | Configure the MTU for the VPLS. Default is 1500; range is <576 - 65535>. |
(config-vpls)#signaling bgp | Enter the Signaling BGP mode, for BGP VPLS. |
(config-vpls-sig)#exit | Exit is a mandatory command for signaling BGP configuration to take affect. If exit is not done, BGP signaling does not take place. |
(config-vpls)#exit | Exit VPLS mode. |
(config)#service-template v1 | Configure service template |
(config-svc)#match all | Configure the match condition |
(config-svc)#exit | Exit interface mode |
(config)#interface eth6 | Specify the interface (eth6) to be configured. |
(config-if)#switchport | Switch to Layer-2 mode. (VPLS can be bound only on the Layer-2 port.) |
(config-if)#mpls-vpls v1 service-template v1 | Bind the VPLS to the Access Interface. |
(config-if-vpls)#exit | Exit VPLS attachment-circuit mode |
(config-if)#exit | Exit interface mode. |
Note: VE ID’s range is from 1 to 64. Administrator should configure the VE ID’s accordingly in their Network.
PE3 - LDP
#configure terminal | Enter configuration mode. |
(config)#router ldp | Enter Router LDP mode. |
(config-router)#transport-address ipv4 3.3.3.3 | Configure the transport address for a label space by binding the address to a loopback address. |
(config-router)#exit | Exit Router mode. |
(config)#interface eth3 | Specify the interface (eth3) to be configured. |
(config-if)#enable-ldp ipv4 | Enable LDP on the interface. |
(config-if)#exit | Exit interface mode. |
PE3 - OSPF
#configure terminal | Enter configuration mode. |
(config)#router ospf 1 | Configure the OSPF routing process, and specify the process ID. |
(config-router)#network 40.40.1.0/24 area 0 | Define the interfaces on which OSPF runs, and specify the backbone area 0. |
(config-router)#network 3.3.3.3/32 area 0 | |
(config-router)#exit | Exit Router mode. |
PE3 - BGP
#configure terminal | Enter configuration mode. |
(config)#router bgp 100 | Enter BGP Router mode. |
(config-router)#neighbor 1.1.1.1 remote-as 100 | Configure PE1 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 PE1 router. |
(config-router)#neighbor 2.2.2.2 remote-as 100 | Configure PE2 as an iBGP peer. |
(config-router)#neighbor 2.2.2.2 update-source lo | Update the source as loopback for iBGP peering with the remote PE2 router. |
(config-router)#address-family l2vpn vpls | Configure address-family l2vpn vpls. |
(config-router-af)#neighbor 1.1.1.1 activate | Activate PE1 in the VPLS address family. |
(config-router-af)#neighbor 2.2.2.2 activate | Activate PE2 in the VPLS address family. |
P
#configure terminal | Enter configuration mode. |
(config)#interface eth1 | Specify the interface (eth1) to be configured. |
(config-if)#ip address 10.10.1.2/24 | Set the IP address of the interface to 10.10.1.2/24. |
(config-if)#label-switching | Enable label switching on interface eth1. |
(config-if)#exit | Exit interface mode. |
(config)#interface eth2 | Specify the interface (eth2) to be configured. |
(config-if)#ip address 40.40.1.2/24 | Set the IP address of the interface to 40.40.1.2/24. |
(config-if)#label-switching | Enable label switching on interface eth2. |
(config-if)#exit | Exit interface mode. |
(config)#interface eth3 | Specify the interface (eth3) to be configured. |
(config-if)#ip address 20.20.1.2/24 | Set the IP address of the loopback interface to 20.20.1.2/24. |
(config-if)#label-switching | Enable label switching on interface eth3. |
(config-if)#exit | Exit interface mode. |
P - LDP
#configure terminal | Enter configuration mode. |
(config)#router ldp | Enter Router LDP mode. |
(config-router)#exit | Exit Router mode. |
(config)#interface eth1 | Specify the interface (eth1) to be configured. |
(config-if)#enable-ldp ipv4 | Enable LDP on the interface. |
(config-if)#exit | Exit interface mode. |
(config)#interface eth2 | Specify the interface (eth2) to be configured. |
(config-if)#enable-ldp ipv4 | Enable LDP on the interface. |
(config-if)#exit | Exit interface mode. |
(config)#interface eth3 | Specify the interface (eth3) to be configured. |
(config-if)#enable-ldp ipv4 | Enable LDP on the interface. |
(config-if)#exit | Exit interface mode. |
P - OSPF
#configure terminal | Enter configuration mode. |
(config)#router ospf 1 | Configure the OSPF routing process, and specify the process ID. |
(config-router)#network 10.10.1.0/24 area 0 | Define the interfaces on which OSPF runs, and specify the backbone area 0. |
(config-router)#network 20.20.1.0/24 area 0 | |
(config-router)#network 40.40.1.0/24 area 0 | |
(config-router)#exit | Exit Router mode. |
Note: BGP L2VPN VPLS Route Reflector is not supported.
Validation
PE1
#show mpls vpls detail
Virtual Private LAN Service Instance: v1, ID: 25
SIG-Protocol: BGP
Route-Distinguisher :100:25
Route-Target :100:25
VE-ID :1
Attachment-Circuit :UP
Learning: Enabled
Group ID: 0, Configured MTU: 1400
Description: none
Redundancy admin role: Primary Redundancy oper role: Primary
Configured interfaces: Interface: eth3 oper-state UP Service-template : v1 Match criteria : Accept all
Mesh Peers:
2.2.2.2 (Up)
3.3.3.3 (Up)
#show mpls vpls mesh
VPLS-ID Peer Addr Tunnel-Label In-Label Network-Intf Out-Label Lkps/St PW-INDEX SIG-Protocol Status Ecmp-Group
25 2.2.2.2 3 24969 eth1 26125 2/Up 1298 BGP Active N/A
25 3.3.3.3 24677 24961 eth1 25605 2/Up 1297 BGP Active N/A
#show bgp l2vpn vpls detail
VPLS ID: 25
VE-ID: 1
Discovered Peers: 2
Route-Target: 1:100
Local RD: 2:100
Mesh Peers:
Address:2.2.2.2, RD:2:100, VE-ID:2
VC Details: VC-ID:610
Remote (LB:26120,VBO:1,VBS:64) Local (LB:24960,VBO:1,VBS:64)
LB sent on known VEID:Yes
In Label:24969, Out Label:26125
PW Status:Established
VC Installed:Yes
All Local LB:
LB:24960,VBO:1,VBS:64
Address:3.3.3.3, RD:2:100, VE-ID:3
VC Details: VC-ID:62
Remote (LB:25600,VBO:1,VBS:64) Local (LB:24960,VBO:1,VBS:64)
LB sent on known VEID:Yes
In Label:24961, Out Label:25605
PW Status:Established
VC Installed:Yes
#show bgp l2vpn vpls 25
VPLS ID: 25
VE-ID: 1
Discovered Peers: 2
Route-Target: 1:100
Local RD: 2:100
Mesh Peers:
Address:2.2.2.2, RD:2:100, VE-ID:2
VC Details: VC-ID:610
Remote (LB:26120,VBO:1,VBS:64) Local (LB:24960,VBO:1,VBS:64)
LB sent on known VEID:Yes
In Label:24969, Out Label:26125
PW Status:Established
VC Installed:Yes
All Local LB:
LB:24960,VBO:1,VBS:64
Address:3.3.3.3, RD:2:100, VE-ID:3
VC Details: VC-ID:62
Remote (LB:25600,VBO:1,VBS:64) Local (LB:24960,VBO:1,VBS:64)
LB sent on known VEID:Yes
In Label:24961, Out Label:25605
PW Status:Established
VC Installed:Yes