Troubleshooting guide

8-9
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
Step 2 Check the peer TDP identifier field. This field indicates the TDP identifier of the neighbor (peer device)
for this session.
Step 3 Check the local TDP identifier field. This field indicates the TDP identifier for the local tag switching
switch router or router for this session.
Step 4 Check the TCP connection field. This field indicates the TCP connection used to support the TDP
session. The format for displaying the TCP connection is peer IP address.peer port local IP address.
Step 5 Check the PIEs sent/rcvd (sent or received) field. This field indicates the number of TDP PIEs sent to
and received from the session peer device. The count includes the transmission and receipt of periodic
keepalive PIEs, which are required for maintenance of the TDP session.
Step 6 Check the Up time field. This field indicates the length of time the TDP session has existed.
Follow these steps to confirm the VPI and VCI configuration of the tag switching interface on the switch
router interface:
Step 1 Enter the show tag-switching interfaces atm card/subcard/port detail command to confirm the
configuration and connection of the tag switching interface VPI and VCI.
AdminFl1Ls1# show tag-switching interfaces atm 0/0/1 detail
Interface ATM0/0/1:
IP tagging enabled
TSP Tunnel tagging not enabled
Tagging operational
MTU = 8940
ATM tagging: Tag VPI range = 2 - 5, Control VC = 6/32
AdminFl1Ls1#
Step 2 Check the IP tagging field. This field shows whether the interface is configured to tag IP packets.
Step 3 Check the Tagging operational field. This field shows whether the packets are being tagged.
Step 4 Check the ATM tagging field. This field indicates the VPI range of the interface.
For detailed information, refer to the “Configuring Tag Switching” chapter in the
ATM Switch Router Software Configuration Guide.
Troubleshooting Tag Switching on VP Tunnels
This section describes how to troubleshoot a tag switching connection configured on a VP tunnel.
For detailed information, refer to the “Configuring Tag Switching” chapter in the
ATM Switch Router Software Configuration Guide.