Topology Overview
The sample topology in Figure 134 on page 666 includes two L2VPNs, L2VPN A and
L2VPN B. L2VPN A connects CE 1, at the edge of Customer A’s Boston site, with
CE 3, at the edge of Customer A’s Chicago site. Similarly, L2VPN B connects CE 2,
at the edge Customer B’s Boston site, with CE 4, at the edge of Customer B’s Chicago
site.
The E Series routers in the topology, PE 1 and PE 2, each participate in both L2VPN A
and L2VPN B. The example configures a total of four separate L2VPN instances, one
for each L2VPN on each PE router. The instances for L2VPN A are named l2vpnA,
and the instances for L2VPN B are named l2vpnB.
For each VPWS instance, an Ethernet network interface provides a connection to
the associated CE device.
Each PE router in the sample topology also has an ATM core-facing interface that
connects it to the provider (P) router in the service provider core. You must configure
MPLS LSPs on the core-facing interfaces to connect PE 1 and PE 2 through the P
router across the service provider core. Finally, you must configure BGP on both PE 1
and PE 2 to provide signaling for both L2VPNs.
Configuration on PE 1 (Local PE Router)
Use the following commands on the local PE router (PE 1) to configure the VPWS
topology shown in Figure 134 on page 666.
! Configure VPWS instance l2vpnA.
host1(config)#l2vpn l2vpnA encapsulation-type ethernet
host1(config)#l2vpn l2vpnA site-range 10
host1(config)#l2vpn l2vpnA site-name boston site-id 1
host1(config)#l2vpn l2vpnA rd 100:11
host1(config)#l2vpn l2vpnA route-target both 100:1
host1(config)#l2vpn l2vpnA control-word
host1(config)#l2vpn l2vpnA sequencing
!
! Configure VPWS instance l2vpnB.
host1(config)#l2vpn l2vpnB encapsulation-type atm
host1(config)#l2vpn l2vpnB site-range 20
host1(config)#l2vpn l2vpnB site-name boston site-id 2
host1(config)#l2vpn l2vpnB rd 100:12
host1(config)#l2vpn l2vpnB route-target both 100:2
host1(config)#l2vpn l2vpnB control-word
host1(config)#l2vpn l2vpnB sequencing
!
! Configure the customer-facing interface between PE 1 and CE 1
! in L2VPN instance l2vpnA.
host1(config)#interface fastEthernet 4/0
host1(config-if)#l2vpn l2vpnA local-site-id 1 remote-site-id 3
host1(config-if)#exit
!
! Configure the customer-facing interface between PE 1 and CE 2
! in L2VPN instance l2vpnB.
VPWS Configuration Example ■ 667
Chapter 13: Configuring VPWS
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