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To configure a local cross-connect between two local sites:

1. Configure the two local sites.

host1(config)#l2vpn exampleco encapsulation-type ethernet

host1(config)#l2vpn exampleco site-name westford site-id 1

host1(config)#l2vpn exampleco site-name boston site-id 2

host1(config)#l2vpn exampleco site-range 10

host1(config)#l2vpn exampleco rd 100:11

host1(config)#l2vpn exampleco route-target both 100:1

2. Configure the correct local and remote site IDs on the two local interfaces that

are being cross-connected.

host1(config)#interface fastEthernet 4/0

host1(config-if)#l2vpn exampleco local-site-id 1 remote-site-id 2

host1(config-if)#exit

host1(config)#interface fastEthernet 4/1

host1(config-if)#l2vpn exampleco local-site-id 2 remote-site-id 1

host1(config-if)#exit

Related Topics Configuring a VPWS Instance on page 659■

■ Configuring Customer-Facing Interfaces in the VPWS Instance on page 661

Configuring the Loopback Interface and Router ID for BGP for VPWS

To establish a BGP session, BGP uses the IP address of the outgoing interface towards

the BGP peer as the update source IP address for the TCP connection over which the

BGP session runs. Typically, you configure a loopback interface as the update source

interface because a loopback interface is inherently stable.

After you configure the loopback interface, use the ip router-id command to assign

a router ID to uniquely identify the router within a BGP AS. The router ID is the IP

address of the loopback interface.

To configure the loopback interface and router ID on the PE router:

1. Configure a loopback interface on the PE router and assign an IP address to the

interface.

host1(config)#interface loopback 0

host1(config-if)#ip address 10.3.3.3 255.255.255.255

host1(config-if)#exit

2. Assign the router ID using the IP address you configured for the loopback

interface.

host1(config)#ip router-id 10.3.3.3

Juniper BGP - CONFIGURATION GUIDE V 11.1.X User Manual

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