Specifications

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Chapter 4 Cisco IGX 8400 Series Trunks
IGX Trunk Troubleshooting
Before reconfiguring a trunk, check the current trunk parameters using the switch software dsptrkcnf
command. Then follow this procedure to reconfigure the trunk:
Step 1 See whether the desired changes require you to delete the trunk (see “cnftrk” in the “Setting Up Trunks”
chapter of the Cisco WAN Switching Command Reference).
Step 2 (For parameters that require trunk deletion) Delete the trunk by entering the switch software deltrk
command on the local node.
Step 3 Reconfigure the trunk on the local node with the switch software cnftrk command.
Step 4 Open a virtual terminal session with the remote node with the switch software vt command.
Step 5 Reconfigure the trunk on the remote node with the switch software cnftrk command.
Step 6 Enter the switch software bye command to close the virtual terminal session.
Step 7 If you deleted a trunk, use the switch software addtrk command on the local node to add the trunk.
Removing a Trunk
To remove a trunk, follow this procedure:
Step 1 Use the switch software deltrk command to delete the trunk. Unless both nodes can be reached, you
must perform this command on both nodes. Connections using the deleted trunk are rerouted.
Step 2 Using the switch software dntrk command on both nodes, deactivate (down) the trunk.
IGX Trunk Troubleshooting
This section contains information on trunk alarms and switch software commands related to
troubleshooting trunks on the IGX. These alarms and error messages display on the nodes serving as
endpoints for the trunk.
For information on trunk alarms, see the “Trunk Alarms” section on page 4-11.
For information on troubleshooting procedures, see the “Troubleshooting an IGX Node” section on
page 4-1 in the Cisco IGX 8400 Series Installation Guide.
Trunk Alarms
Trunk alarms indicate operational problems in the trunk and can be used to troubleshoot the trunk.
Physical trunk alarms also apply to virtual trunks, and apply to all other trunks on the port. For more
information on trunk alarms, see Table 4-9.
Note Switch software supports per-trunk statistical alarming on cell drops from each of the advanced CoS
management queues on a virtual trunk.