Troubleshooting guide
8-4
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 8 Troubleshooting Tag and MPLS Switching Connections
Initial Troubleshooting of Tag Switching
Follow these steps to confirm the TDP identifier for the routers or tag switching switch routers that might
be malfunctioning:
Step 1 Enter the show tag-switching tdp discovery command to determine the tag discovery protocol identifier
of the tag switching switch router.
AdminFl1Ls1# show tag-switching tdp discovery
Local TDP Identifier:
172.20.40.161:0
TDP Discovery Sources:
Interfaces:
ATM1/0/0: xmit/recv
TDP Id: 150.0.0.0:1
ATM3/0/0.10: xmit/recv
TDP Id: 160.0.0.0:1
AdminFl1Ls1#
Step 2 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 3 Check the Interfaces field. This field displays the interfaces engaging in TDP discovery activity:
–
xmit indicates that the interface is transmitting TDP discovery hello packets.
–
recv indicates that the interface is receiving TDP discovery hello packets.
If either xmit or recv do not appear, refer to the “Configuring Tag Switching” chapter in the
ATM Switch Router Software Configuration Guide.
Follow these steps to ping each tag switching switch router or router. This process confirms that each
can connect to the TDP identifie
r of the neighbor:
Step 1 Enter the ping command to confirm the connection to the TDP of the neighbor.
AdminFl1Ls1# ping
Protocol [ip]:
Target IP address: 180.0.0.0
Repeat count [5]:
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]: y
Source address or interface: 140.0.0.0
Type of service [0]:
Set DF bit in IP header? [no]:
Validate reply data? [no]:
Data pattern [0xABCD]:
Loose, Strict, Record, Timestamp, Verbose[none]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echoes to 180.0.0.0, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 184/398/1188 ms
AdminFl1Ls1#
Step 2 Check the Success rate field. This field should read “100 percent”. If it does not, continue with the
following troubleshooting steps.