Example: Configuring VPLS with BGP Signaling
The example in
this section shows how to configure the VPLS topology illustrated
in Figure 131. The example includes the commands
for configuring VPLS on both the local E Series router (PE 1)
and the remote E Series router (PE 2).
Figure 131: Topology for VPLS Configuration Example
with BGP Signaling
Topology Overview of VPLS with BGP Signaling
The sample topology in Figure 131 includes two VPLS domains, VPLS A and VPLS B. VPLS 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,
VPLS 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 the VPLS A domain and the
VPLS B domain. The example configures a total of four separate
VPLS instances, one for each VPLS domain in which the PE router participates.
The instances for the VPLS A domain are named vplsA, and the
instances for the VPLS B domain are named vplsB.
For each VPLS instance, an Ethernet or bridged
Ethernet network interface provides a connection to the associated
CE device. Each VPLS instance maintains its own set of forwarding
tables and filters to learn the network topology, in a manner that
is similar to a bridge group used for transparent bridging.
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
VPLS domains.
After you configure the bridging, MPLS, and BGP
components of VPLS, the router automatically generates a VPLS virtual
core interface for each VPLS instance. The VPLS virtual core interface
represents all of the MPLS tunnels from the router to the remote VE
device.
Configuration on PE 1 (Local PE Router)
Use the following commands on the local PE router
(PE 1) to configure the VPLS topology shown in Figure 131.
! Configure VPLS instance vplsA.host1(config)#bridge vplsA vpls transport-virtual-router
default host1(config)#bridge vplsA vpls site-range
10 host1(config)#bridge vplsA vpls site-name
boston site-id 1 host1(config)#bridge vplsA vpls rd 100:11 host1(config)#bridge vplsA vpls route-target
both 100:1 !! Configure VPLS instance vplsB.host1(config)#bridge vplsB vpls transport-virtual-router
default host1(config)#bridge vplsB vpls site-range
20 host1(config)#bridge vplsB vpls site-name
boston site-id 1 host1(config)#bridge vplsB vpls rd 100:12 host1(config)#bridge vplsB vpls route-target
both 100:2 !! Configure Fast Ethernet interface 3/0 between PE 1 and
CE 1, ! and assign it to vplsA as a trunk interface.host1(config)#interface fastEthernet 3/1 host1(config-if)#bridge-group vplsA subscriber-trunk host1(config-if)#exit !! Configure bridged Ethernet interface 2/0.12 between PE
1 and CE 2, ! and assign it to vplsB as a trunk interface.host1(config)#interface atm 2/0.12 point-to-point host1(config-subif)#atm pvc 12 0 12 aal5snap
0 0 0 host1(config-subif)#encapsulation bridge1483
mac-address 0090.1a40.9991 host1(config-subif)#bridge-group vplsB subscriber-trunk 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 10.1.1.1 !! 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,! and assign it an IP address.host1(config)#interface atm 2/0.100 point-to-point host1(config-subif)#atm pvc 100 1 100 aal5snap
0 0 0 host1(config-subif)#ip address 192.168.1.1
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 !! Configure BGP signaling.host1(config)#router bgp 100 host1(config-router)#neighbor 10.2.2.2 remote-as
100 host1(config-router)#neighbor 10.2.2.2 update-source
loopback 0 host1(config-router)#neighbor 10.2.2.2 next-hop-self host1(config-router)#address-family l2vpn
signaling host1(config-router-af)#neighbor 10.2.2.2
activate host1(config-router-af)#neighbor 10.2.2.2
next-hop-self host1(config-router-af)#exit-address-family host1(config-router)#address-family vpls vplsA host1(config-router-af)#exit-address-family host1(config-router)#address-family vpls vplsB host1(config-router-af)#exit-address-family host1(config-router)#exit
Configuration on PE 2 (Remote PE Router)
Use the following commands on the remote PE router
(PE 2) to configure the VPLS topology shown in Figure 131.
! Configure VPLS instance vplsA. The route target (100:1) ! matches the route target configured for vplsA on PE 1.host2(config)#bridge vplsA vpls transport-virtual-router
default host2(config)#bridge vplsA vpls site-range
10 host2(config)#bridge vplsA vpls site-name
chicago site-id 2 host2(config)#bridge vplsA vpls rd 100:21 host2(config)#bridge vplsA vpls route-target
both 100:1 !! Configure VPLS instance vplsB. The route target (100:2) ! matches the route target configured for vplsB on PE 1.host2(config)#bridge vplsB vpls transport-virtual-router
default host2(config)#bridge vplsB vpls site-range
20 host2(config)#bridge vplsB vpls site-name
chicago site-id 2 host2(config)#bridge vplsB vpls rd 100:22 host2 (config)#bridge vplsB vpls route-target
both 100:2 ! Configure Fast Ethernet interface 3/5 between PE 2 and
CE 3, ! and assign it to vplsA as a trunk interface.host2(config)#interface fastEthernet 3/5 host2(config-if)#bridge-group vplsA subscriber-trunk host2(config-if)#exit !! Configure bridged Ethernet interface 2/0.21 between PE
2 and CE 4, ! and assign it to vplsB as a trunk interface.host2(config)#interface atm 2/0.21 point-to-point host2(config-subif)#atm pvc 21 0 21 aal5snap
0 0 0 host2(config-subif)#encapsulation bridge1483
mac-address 0090.1a40.9992 host2(config-subif)#bridge-group vplsB subscriber-trunk 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 !! 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 192.168.2.2
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 !! Configure BGP signaling.host2(config)#router bgp 100 host2(config-router)#neighbor 10.1.1.1 remote-as
100 host2(config-router)#neighbor 10.1.1.1 update-source
loopback 0 host2(config-router)#neighbor 10.1.1.1 next-hop-self host2(config-router)#address-family l2vpn
signaling host2(config-router-af)#neighbor 10.1.1.1
activate host2(config-router-af)#neighbor 10.1.1.1
next-hop-self host2(config-router-af)#exit-address-family host2(config-router)#address-family vpls vplsA host2(config-router-af)#exit-address-family host2(config-router)#address-family vpls vplsB host2(config-router-af)#exit-address-family host2(config-router)#exit
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