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Catalyst 3750, 3560, 3550, 2975, 2970, and 2960 Switch System Message Guide
OL-8551-04
Chapter 3 Message and Recovery Procedures
GIGASTACK Messages
GIGASTACK Messages
This section contains the GigaStack GBIC module messages.
Error Message GIGASTACK-1-NO_LOOP_DETECT: The link neighbor of link [dec] of
GigaStack GBIC in [chars] did not respond to the loop detection request. If loop
topology is deployed, make sure all switches in the stack are running the latest
software.
Note This message applies only to Catalyst 3550 switches.
Explanation No acknowledgement for the loop-detection request is received from one of the links on
a GigaStack GBIC module. Either the neighboring switch does not support the GigaStack GBIC
loop-breaking algorithm, or the link between the two GigaStack G BIC modules is broken. Under
this condition, a GigaStack loop topology is not autom atically detected, and the connectivity
between switches in the stack can be lost. [dec] is the link number, and [chars] is the slot number.
Recommended Action If a loop topology is used with the GigaStack GBIC m odule, ensure that the
latest software is running on all switches in the stack. Check the GigaStack GBIC modules involved
to ensure that they are functioning.
Error Message GIGASTACK-3-INIT_FAILURE: GigaStack GBIC in [chars] initialization
failed.
Note This message applies only to Catalyst 3550 switches.
Explanation The GigaStack GBIC module failed power-on self-test (POST). [chars] is the interface
name.
Recommended Action Remove the GigaStack GBIC module, and re-insert it i nto the GBIC module
slot.
Error Message GIGASTACK-6-LOOP_BROKEN: Link loss is detected in the GigaStack loop.
Link 2 of the GigaStack GBIC in [chars] is re-enabled.
Note This message applies only to Catalyst 3550 switches.
Explanation The loop formed by GigaStack GBIC modules is broken because of a link loss. Link 2
of the master loop breaker is re-enabled to replace the broken link. [chars] is the interface name.
Recommended Action No action is required.