The example in this section shows how to configure the VPWS topology illustrated in Figure 127. The example includes procedures for configuring VPWS on both the local E-series router (PE 1) and the remote E-series router (PE 2).
Figure 127: Topology for VPWS Configuration Example
The sample topology in Figure 127 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.
Use the following commands on the local PE router (PE 1) to configure the VPWS topology shown in Figure 127.
- ! 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.
- host1(config)#interface gigabitEthernet 1/1
- host1(config-subif)#l2vpn l2vpnB local-site-id
2 remote-site-id 4
- host1(config-if)#exit
- !
- ! Configure a loopback interface on PE 1 and assign it
an IP address.
- host1(config)#interface loopback 0
- host1(config-if)#ip address 10.1.1.1 255.255.255.255
- host1(config-if)#exit
- !
- ! Assign the router ID for PE 1 using the IP address of
the loopback interface.
- host1(config)#ip router-id 10.3.3.3
- !
- ! Configure BGP signaling.
- host1(config)#router bgp 738
- host1(config-router)#neighbor 10.1.1.1 remote-as
738
- host1(config-router)#neighbor 10.1.1.1 update-source
loopback 0
- host1(config-router)#neighbor 10.1.1.1 next-hop-self
- host1(config-router)#address-family l2vpn
signaling
- host1(config-router-af)#neighbor 10.1.1.1
activate
- host1(config-router-af)#neighbor 10.1.1.1
next-hop-self
- host1(config-router-af)#exit-address-family
- host1(config-router)#address-family vpws l2vpnA
- host1(config-router-af)#exit-address-family
- host1(config-router)#address-family vpws l2vpnB
- host1(config-router-af)#exit-address-family
- !
- ! Enable MPLS on the default virtual router.
- host1(config)#mpls
- ! Configure ATM core-facing interface 2/0.100 between PE
1 and the P router,
- host1(config)#interface atm 2/0.100
- host1(config-subif)#atm pvc 100 1 100 aal5snap
0 0 0
- ! and assign it an IP address.
- host1(config-subif)#ip address 192.168.5.5
255.255.255.0
- !
- ! Enable MPLS, LDP, and topology-driven LSPs on the core-facing
interface.
- host1(config-subif)#mpls
- host1(config-subif)#mpls ldp
- host1(config-subif)#exit
Use the following commands on the remote PE router (PE 2) to configure the VPWS topology shown in Figure 127.
- ! Configure VPWS instance l2vpnA. The route target (100:1)
- ! matches the route target configured for l2vpnA on PE 1.
- host2(config)#l2vpn l2vpnA encapsulation-type
ethernet
- host2(config)#l2vpn l2vpnA site-range 10
- host2(config)#l2vpn l2vpnA site-name chicago
site-id 3
- host2(config)#l2vpn l2vpnA rd 100:11
- host2(config)#l2vpn l2vpnA route-target both
100:1
- host2(config)#l2vpn l2vpnA control-word
- host2(config)#l2vpn l2vpnA sequencing
- !
- ! Configure VPWS instance l2vpnB. The route target (100:2)
- ! matches the route target configured for l2vpnB on PE 1.
- host2(config)#l2vpn l2vpnB encapsulation-type
ethernet
- host2(config)#l2vpn l2vpnB site-range 20
- host2(config)#l2vpn l2vpnB site-name chicago
site-id 4
- host2(config)#l2vpn l2vpnB rd 100:12
- host2(config)#l2vpn l2vpnB route-target both
100:2
- host2(config)#l2vpn l2vpnB control-word
- host2(config)#l2vpn l2vpnB sequencing
- !
- ! Configure the customer-facing interface between PE 2
and CE 3
- ! in L2VPN instance l2vpnA.
- host2(config)#interface fastEthernet 3/5
- host2(config-if)#l2vpn l2vpnA local-site-id
3 remote-site-id 1
- host2(config-if)#exit
- !
- ! Configure the customer-facing interface between PE 2
and CE 4
- ! in L2VPN instance l2vpnB.
- host2(config)#interface gigabitEthernet 0/1
- host2(config-subif)#l2vpn l2vpnB local-site-id
4 remote-site-id 2
- host2(config-if)#exit
- !
- ! Configure a loopback interface on PE 2 and assign it
an IP address.
- host2(config)#interface loopback 0
- host2(config-if)#ip address 10.2.2.2 255.255.255.255
- host2(config-if)#exit
- !
- ! Assign the router ID for PE 2 using the IP address of
the loopback interface.
- host2(config)#ip router-id 10.2.2.2
- !
- ! Configure BGP signaling.
- host2(config)#router bgp 738
- host2(config-router)#neighbor 10.2.2.2 remote-as
738
- host2(config-router)#neighbor 10.2.2.2 update-source
loopback 0
- host2(config-router)#neighbor 10.2.2.2 next-hop-self
- host2(config-router)#address-family l2vpn
signaling
- host2(config-router-af)#neighbor 10.2.2.2
activate
- host2(config-router-af)#neighbor 10.2.2.2
next-hop-self
- host2(config-router)#address-family vpws l2vpnA
- host2(config-router-af)#exit-address-family
- host2(config-router)#address-family vpws l2vpnB
- host2(config-router-af)#exit-address-family
- !
- ! Enable MPLS on the default virtual router.
- host2(config)#mpls
- !
- ! Configure ATM core-facing interface 3/1.100 between PE
2 and the P router,
- ! and assign it an IP address.
- host2(config)#interface atm 3/1.100 point-to-point
- host2(config-subif)#atm pvc 100 1 100 aal5snap
0 0 0
- host2(config-subif)#ip address 192.168.4.4
255.255.255.0
- !
- ! Enable MPLS, LDP, and topology-driven LSPs on the on
the core-facing interface.
- host2(config-subif)#mpls
- host2(config-subif)#mpls ldp
- host2(config-subif)#exit
- !
- ! Enable MPLS, LDP, and topology-driven LSPs on the core-facing
interface.
- host1(config-subif)#mpls
- host1(config-subif)#mpls ldp
- host1(config-subif)#exit
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