! Configure a virtual router CE2
host1(config)#virtual-router ce2
!
! Specify a Gigabit Ethernet interface and assign VLAN as the encapsulation method.
host1:ce2(config)#interface gigabitEthernet 2/1/7
host1:ce2(config-if)#encapsulation vlan
!
! Create a subinterface, assign an S-VLAN ID, and configure an IP address and mask
to it.
host1:ce2(config-if)#interface gigabitEthernet 2/1/7.1
host1:ce2(config-subif)#svlan id 1 1
host1:ce2(config-subif)#ip address 7.7.7.8 255.255.255.0
Related Topics MPLS L2VPN Tunnel over LAG Configuration Example on page 551■
■ CE-Side MPLS L2VPNs over LAG Overview on page 521
MPLS L2VPN Tunnel over LAG Configuration Example
Figure 123 on page 551 shows a sample configuration scenario of an MPLS L2VPN
or Martini tunnel over LAG. The topology is the same as the one described in “MPLS
L2VPN Tunnel over VLAN over LAG Configuration Example” on page 547, with the
exception of LAG bundles being used to transmit traffic from CE1 to PE1 instead of
using a VLAN subinterface over a LAG bundle. Because the Martini tunnel is configured
directly over LAG in this case, only the source and destination MAC addresses are
used in the hashing process to determine the physical link for forwarding the received
packets.
Two LAG bundles, LAG1 and LAG2, are created to group multiple Ethernet interfaces
from PE1 to CE1. A Martini tunnel from PE1 to PE2 is configured over LAG2 with a
unique subinterface number assigned to the LAG bundle. The MPLS packets that are
received on PE2, which is the remote router located at the other side of the service
provider core, are checked to determine whether they need to be processed for MPLS
labels. After PE2 processes the layer 2 Ethernet frames, they are sent to CE2, which
is the customer edge device at the remote site.
Figure 123: MPLS L2VPN Tunnel over LAG Configuration Example
PE1CE1 CE2PE2
g016506
7.7.7.7/24 11.11.11.11/32 22.22.22.22/32 7.7.7.8/24
2/1/0
2/1/3
2/1/1
2/1/2
2/1/4
2.0.0.1/24
vlan id 20
2/1/5
2.0.0.2/24
2/1/6 2/1/7
MPLS LDP signaling
Martini tunnel
mpls-relay with vcid = 1
lag 1 lag 2
CE-Side MPLS L2VPN over LAG
MPLS L2VPN Tunnel over LAG Configuration Example ■ 551
Chapter 7: Configuring Layer 2 Services over MPLS
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