3com S7906E Manuel De Montage
1-26
[NPE3–mpls-ldp] quit
# Configure MPLS basic capability on the interface connected with NPE 1.
[NPE3] interface vlan-interface 15
[NPE3-Vlan-interface15] ip address 15.1.1.2 24
[NPE3-Vlan-interface15] mpls
[NPE3-Vlan-interface15] mpls ldp
[NPE3-Vlan-interface15] quit
# Configure the remote LDP session.
[NPE3] mpls ldp remote-peer 1
[NPE3-mpls-remote-1] remote-ip 2.2.2.2
[NPE3-mpls-remote-1] quit
[NPE3] mpls ldp remote-peer 2
[NPE3-mpls-remote-2] remote-ip 3.3.3.3
[NPE3-mpls-remote-2] quit
# Configure MPLS L2VPN.
[NPE3] mpls l2vpn
# Configure the basic attributes of VPLS instance aaa, which uses LDP.
[NPE3] vsi aaa static
[NPE3-vsi-aaa] pwsignal ldp
[NPE3-vsi-aaa-ldp] vsi-id 500
[NPE3-vsi-aaa-ldp] peer 2.2.2.2
[NPE3-vsi-aaa-ldp] peer 3.3.3.3
[NPE3-vsi-aaa-ldp] quit
[NPE3-vsi-aaa] quit
The configuration of VLAN-interface 15 and VLAN-interface 16 is similar to the configuration of
VLAN-interface 12 and VLAN-interface 13 on UPE. The configuration procedure is omitted.
After completing the above configurations, you can execute the display vpls connection command on
the PEs. There should be a PW connection established and in the state of up.
Troubleshooting VPLS
Symptom:
The VPLS link PW is not up.
Analysis:
z
The public network LSP tunnel is not established.
z
The extended session is not working normally.
Solution:
z
Check the routing tables of the PEs to see whether a route is available between the two PEs.
Check whether each device can ping the loopback interface of the peer and whether the LDP
session is normal.
z
Check whether any extended session configuration command is missing at either side.
z
Check whether the private network interfaces are up or whether the PW to the UPE is up.
z
Check whether the PW ID and transport mode are the same on the two peers.