Juniper JUNOSE SOFTWARE FOR E SERIES 11.0.X - BGP AND MPLS CONFIGURATION GUIDE 2009-12-30 Configuration Manual page 693

To configure a local cross-connect between two local sites:
1.
2.
Related Topics
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.
2.
Related Topics
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
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
Configuring a VPWS Instance on page 653
Configuring Customer-Facing Interfaces in the VPWS Instance on page 655
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
Assign the router ID using the IP address you configured for the loopback
interface.
host1(config)#ip router-id 10.3.3.3
interface loopback
Configuring the Loopback Interface and Router ID for BGP for VPWS
Chapter 13: Configuring VPWS
657