Allied Telesis AT-9448Ts/XP (Basic Layer 3) - Manual (Page 67)

AT-9400Ts Stack Installation Guide
67
Troubleshooting the Discovery Process
The easiest way to troubleshoot a stack that cannot complete the
discovery process is by watching for error messages on the Terminal Port
of the master switch. Here are the steps:
1. Connect a terminal or a personal computer with a terminal emulation
program to the Terminal Port on the master switch, as explained in
“Starting a Local Management Session” on page 50.
2. Power on all the switches in the stack. If the switches are already
powered on, power off a switch, wait a few seconds and then power it
back on again. Alternatively, disconnect and then reconnect a stacking
cable from a stacking module.
Possible error messages are:
More than maximum allowed number of switches.
The stack has too many switches. Review “Maximum Number of Switches
in a Stack” on page 37 and remove one or more of the devices.
Mixed module ID mode is not supported. Failed to form a
stack
Failed to elect a stack Master in the static mode.
Stack setup has failed.
The appearance of either of these messages could indicate that the stack
has both dynamic and static stack ID numbers. The ID numbers of a stack
must be static. Resolving the problem requires disconnecting the stacking
cables from the switches and resetting the numbers with the SET STACK
command. For instructions, “Assigning the Static Module ID Number 1 to
the Master Switch” on page 54 and “Assigning Static Module ID Numbers
to the Member Switches” on page 57.
The second message could also indicate that there are no switches
numbered 1 or 2 in the stack. A stack must have one switch assigned ID
number 1 or 2.
Module ID conflict. Failed to form a stack
This message indicates that the same static ID number was assigned to
more than one switch. To resolve the issue, repeat the procedures
“Assigning the Static Module ID Number 1 to the Master Switch” on
page 54 and “Assigning Static Module ID Numbers to the Member
Switches” on page 57. Alternatively, refer to the SET STACK command in
the AT-S63 Command Line Interface User’s Guide.