Panasonic NN46240-710 - Manual (Page 125)

Nortel Secure Router 8000 Series
Troubleshooting - VPN___________ 4 MPLS L2VPN troubleshooting
• In CCC mode, use the display ccc command or the display layer 2 vpn ccc-interface
vc-type command.
• In SVC mode, use the display mpls static-l2vc command.
• In Martini mode, use the display mpls l2vc command.
• In Kompella mode, use the display mpls layer 2 vpn connection command.
If the status of the connection is Up, but the packet cannot forward normally, check that the AC
interfaces on CE are on the same network segment.
For the static VC, check that the in-label and the out-label, and that of the remote end are
consistent.
• transmit-vpn-label on the local end and receive-vpn-label on the remote end are
consistent.
• receive-vpn-label on the local end and transmit-vpn-label on the remote end are
consistent.
If the CEs still cannot communicate, use the display fib command and the display ip
routing-table command to view whether the forwarding table and the routing table are
consistent.
• If the tables are not consistent, the forwarding entry may not be delivered. You must delete
the VC and reconfigure it.
• If the tables are consistent, contact Nortel technical personnel.
If the status of the Layer 2 VPN is Down, do as follows.
Step 3 Do as follows in the case of remote connection.
1. Check that the outer tunnel (public network tunnel) exists.
• L2VC connection: Run the display mpls l2vc interface command. If VC tunnel/token
info does not appear in the output, check if the tunnel configuration is correct. If the text
does appear, but TNL ID is 0x0, check that routes are reachable to both ends of a tunnel. If
it is an SVC connection, check if the label at both ends match. For a same SVC connection,
the egress label of one end must be the ingress label of another end as shown in Figure
4-11.
Figure 4-11 Sketch map of the SVC remote connection label
Kompella mode: Run the display mpls Layer 2 VPN connection interface command. If
tunnel type does not appear in the output, or id that follows is 0x0, check that the routes are
reachable at both ends of a tunnel.
Issue 5.3 (30 March 2009) Nortel Networks Inc. 4-15