In This Chapter; Link Issues - HP SN3000B Troubleshooting Manual

ISL Trunking

In this chapter

Link issues

This section describes trunking link issues that can come up and recommended actions to take to
correct the problems.
Symptom A link that is part of an ISL trunk failed.
Probable cause and recommended action
Use the trunkDebug port1 port2 command to troubleshoot the problem, as shown in the following
procedure.
1. Connect to the switch and log in as admin.
2. Enter the trunkDebug port1 port2 command:
The trunkDebug command displays the possible reason that two ports cannot be trunked. Possible
reasons are:
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where:
port1 Specify the area number or index of port 1. Use the switchShow command to
view the area or index numbers for a port. This operand is required.
port2 Specify the area number or index of port 2. Use the switchShow command to
view the area or index numbers for a port. This operand is required.
Example of an unformed E_Port
This example shows that port 3 is not configured as an E_Port:
ecp:admin> trunkdebug 126, 127
port 126 is not E/EX port
port 127 is not E/EX port
Example of a formed E_Port
ecp:admin> trunkdebug 100, 101
port 100 and 101 connect to the switch 10:00:00:05:1e:34:02:45
The switch does not support trunking.
A trunking license is required.
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