3com S7906E Manuel De Montage

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[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:

The public network LSP tunnel is not established.

The extended session is not working normally.

Solution:

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.

Check whether any extended session configuration command is missing at either side.

Check whether the private network interfaces are up or whether the PW to the UPE is up.

Check whether the PW ID and transport mode are the same on the two peers.