HP 2920 Installation And Getting Started Manual page 80

Troubleshooting
Diagnosing with the LEDs
Tip
The stacking module on this switch has
experienced a failure.
4
The Test LED on the front of the switch may
also be blinking orange simultaneously.
A stack link failure has occurred in a chain
topology and multiple stack fragments
5
have been created. Each fragment will
elect a Commander, so there will be
multiple switches with the Cmd LED on.
A stack link failure has occurred in a chain
topology and multiple stack fragments
have been created.
One of the fragments has been made
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inactive according to the rules of the stack
operation. All the network ports on the
switches in the inactive fragment are
disabled. As a result, all the port LEDs are
off for those switches.
You have tried to merge two stacks that
have different Stack IDs – they were not
previously part of the same stack.
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This is not allowed by the stack operation
rules.
You have tried to add a fifth switch to a
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stack. A maximum of four switches can be
stacked together.
5-10
Problem
1. Try resetting the switch by pressing the Reset button on the
front of the switch, or by power cycling the switch.
2. If the fault indication reoccurs, the stacking module may
have to be replaced.
This error could result in changes to the stack configuration
including election of a new stack Commander, and possibly a
new Standby. See the Stack Management chapter in the
Advance Traffic Management Guide for your switch for more
information.
If necessary to resolve the problem, contact your HP authorized
LAN dealer, or use the electronic support services from HP to
get assistance. See "HP Customer Support Services" on
page 5-15.
Repair the cause of the stack link failure and reconnect the
switches in their original topology so that the switches can
reform the original stack.
Repair the cause of the stack link failure so that the switches
can reform the original stack.
1. Select one of the stacks as the one to retain.
2. For the switches in the other stack, erase their stacking
configuration by issuing the following config-level CLI com-
mand to each switch:
HP Switch(config)# stacking factory-reset
This erases the complete startup configuration for each
switch, including the stacking configuration.
3. Add the switches to the stack as described in the Stack
Management chapter in the Advanced Traffic Management
Guide for your switch.
Disconnect the fifth switch from the stack.
Solution