Troubleshooting guide

8-8
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 8 Troubleshooting Tag and MPLS Switching Connections
Troubleshooting TDP Neighbors
Follow these steps to confirm the OSPF configuration on the switch router:
Step 1 Enter the show ip ospf command to confirm the OSPF configuration of the switch router.
AdminFl1Ls1# show ip ospf
Routing Process “ospf 10000” with ID 150.0.0.0
Supports only single TOS(TOS0) routes
SPF schedule delay 5 secs, Hold time between two SPFs 10 secs
Number of DCbitless external LSA 0
Number of DoNotAge external LSA 0
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Area BACKBONE(0) (Inactive)
Number of interfaces in this area is 3
Area has no authentication
SPF algorithm executed 2 times
Area ranges are
Link State Update Interval is 00:30:00 and due in 00:28:44
Link State Age Interval is 00:20:00 and due in 00:18:44
Number of DCbitless LSA 0
Number of indication LSA 0
Number of DoNotAge LSA 0
AdminFl1Ls1#
Step 2 Check the Routing Process field. The ospf field and ID fields should match the configured numbers. If
they do not, refer to the “Configuring Tag Switching” chapter in the
ATM Switch Router Software Configuration Guide.
Troubleshooting TDP Neighbors
This section describes how to troubleshoot TDP control channel VPI and virtual channel identifier
(VCI).
Although not necessary for most configurations, you can change the default VPI and VCI of the TDP
control channel if you want to use a nondefault value.
Note The default TDP control channel is on VPI 0 and VCI 32. TDP control channels exchange TDP hellos
and PIEs to establish two-way TDP sessions. Tag virtual channels (TVCs) are created by the
exchange of PIEs through TDP control circuit.
Use the following command to check the tag switching TDP neighbor connections:
Follow these steps to check the tag switching TDP neighbor connections:
Step 1 Enter the show tag-switching tdp neighbor command to confirm the tag switching TDP neighbor
connections.
Command Purpose
show tag-switching tdp neighbor Confirms the tag switching TDP neighbor
connection.