Troubleshooting guide

8-10
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 8 Troubleshooting Tag and MPLS Switching Connections
Troubleshooting Tag Switching on VP Tunnels
To confirm VP tunnel configuration of tag switching, perform the following tasks in EXEC mode:
Follow these steps to confirm the VP tunnel configuration of tag switching:
Step 1 Enter the show atm vp command to confirm VP tunnel configuration.
EngFl1Ls1# show atm vp
Interface VPI Type X-Interface X-VPI Status
ATM4/0/0 51 PVP ATM1/1/0 101 UP
ATM1/1/0 101 PVP ATM3/0/0 51 UP
EngFl1Ls1#
Step 2 Check the Status field. The PVP status should be UP. If it is not, check the VP tunnel configuration. Refer
to “Configuring Tag Switching” chapter in the ATM Switch Router Software Configuration Guide.
Follow these steps to confirm the tag switching VP tunnel configuration:
Step 1 Enter the show tag-switching interfaces command to confirm VP tunnel configuration on each router
or switch router in the network. The following example starts at the head end:
EngFl1Rt1# show tag-switching tsp-tunnels
Signalling Summary:
TSP Tunnels Process: running
RSVP Process: running
Forwarding: enabled
TUNNEL ID DESTINATION STATUS CONNECTION
10.106.0.6 0 10.2.0.12 up up
EngFl1Rt1#
Step 2 Enter the show tag-switching tsp-tunnels command to confirm VP tunnel configuration at the middle
switch routers or routers:
AdminFl1Ls1# show tag-switching tsp-tunnels
Signalling Summary:
TSP Tunnels Process: running
RSVP Process: running
Forwarding: enabled
TUNNEL ID DESTINATION STATUS CONNECTION
10.106.0.6 0 10.2.0.12 up up
AdminFl1Ls1#
Command Purpose
show atm vp Confirms the VP tunnel configuration on
an interface.
show tag-switching tsp-tunnels [ip-address | all |
head | middle | tail | remote] [interface-num]
[brief]
Confirms the TSP
1
tunnel status and
configuration.
1. TSP = tag switching path