Configuring BGP Signaling for VPWS

This section describes one way to configure BGP signaling for VPWS, but does not provide complete details about configuring BGP and BGP/MPLS VPNs..

Table 101 lists the commands used in this section to configure BGP signaling for VPWS.

Table 101: Commands to Configure BGP Signaling for VPWS

address-family l2vpn

neighbor next-hop-self

address-family vpws

neighbor remote-as

exit-address-family

neighbor update-source

neighbor activate

router bgp

To configure BGP signaling for an VPWS L2VPN on the PE router:

Enable the BGP routing process on the PE router in the specified local AS.

The AS number identifies the PE router to other BGP routers.


                  
                     host1(config)#router bgp 738

Configure the PE-to-PE BGP session. Use neighbor commands to specify the PE router peers to which BGP advertises routes and to configure additional BGP attributes.


                  
                     host1(config-router)#neighbor 10.2.2.2 remote-as
                           738 
                     
                     host1(config-router)#neighbor 10.2.2.2 update-source
                           loopback 0 
                     
                     host1(config-router)#neighbor 10.2.2.2 next-hop-self

Create the L2VPN address family to configure the router to use BGP signaling to exchange layer 2 NLRI to peer PE routers for all VPWS instances.

Optionally, you can use the signaling

keyword with the

address-family command when you configure the L2VPN address family to specify BGP signaling of VPWS reachability information. Currently, you can omit the signaling

keyword with no adverse effects.


                  
                     host1(config-router)#address-family l2vpn
                           signaling

Activate the neighbors with which routes of the L2VPN address family are exchanged for this PE-to-PE BGP session. Use the bgp dampening command and BGP neighbor commands to configure additional address family parameters for the session. No other commands are supported in this address family.


                  
                     host1(config-router-af)#neighbor 10.2.2.2
                           activate 
                     
                     host1(config-router-af)#neighbor 10.2.2.2
                           next-hop-self

Exit the address family.


                  
                     host1(config-router-af)#exit-address-family

Create the VPWS address family to configure the router to exchange layer 2 NLRI for each VPWS instance configured on the router.

You must issue the address-family vpws command separately for each VPWS instance configured on the router.


                  
                     host1(config-router)#address-family vpws l2vpnA 
                     
                     host1(config-router)#address-family vpws l2vpnB

Configuring BGP Signaling for VPWS

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