Troubleshooting guide

8-5
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 that tag switching is configured on the switch router and its interfaces:
Step 1 Enter the show running-config command to confirm that tag switching is enabled on the
ATM switch router.
AdminFl1Ls1# show running-config
Building configuration...
Current configuration:
!
version 11.3
no service pad
!
<Information deleted>
!
interface ATM0/1/1
ip unnumbered Loopback0
tag-switching ip
!
interface ATM1/0/0
ip address 150.0.0.0 255.255.255.224
tag-switching ip
!
<Information deleted>
!
end
AdminFl1Ls1#
Step 2 Check the tag switching switch router interface to confirm that tag switching is enabled on the
connections.
For detailed interface configuration information about tag switching, refer to the “Configuring Tag
Switching” chapter in the ATM Switch Router Software Configuration Guide.
The neighbor information branch can have information about all TDP neighbors or can be limited to the
neighbor with a specific IP address, or TDP identifier, or to TDP neighbors known to be accessible over
a specific interface.
Follow these steps to display the status of TDP sessions:
Step 1 Enter the show tag-switching tdp neighbor command to display the status of TDP sessions.
AdminFl1Ls1# show tag-switching tdp neighbor
Peer TDP Ident: 1.0.12.12:2; Local TDP Ident 1.0.11.11:2
TCP connection: 1.0.12.12.11008 - 1.0.11.11.711
State: Oper; PIEs sent/rcvd: 2199/2198; Downstream on demand
Up time: 02:31:58
TDP discovery sources:
ATM0/0/1
Peer TDP Ident: 1.0.12.12:8; Local TDP Ident 1.0.11.11:7
TCP connection: 1.0.12.12.11015 - 1.0.11.11.711
State: Oper; PIEs sent/rcvd: 2119/2130; Downstream on demand
Up time: 02:31:39
TDP discovery sources:
ATM0/1/0.19
Peer TDP Ident: 1.0.12.12:7; Local TDP Ident 1.0.11.11:6
TCP connection: 1.0.12.12.11016 - 1.0.11.11.711