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Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
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Appendix A System Messages
Error Message and Recovery Procedures
Error Message GIGASTACK-6-LOOP_DETECTED
Explanation A loop has been detected in the GigaStack, and this GigaStack GBIC is selected as the
master loop breaker. Link 2 of this GigaStack GBIC is disabled to break the loop.
Recommended Action No action is required.
Error Message GIGASTACK-6-NO_LOOP_DETECT
Explanation No acknowledgement for GigaStack loop detection request is received from one of the
links on a GigaStack GBIC. Either the neighboring switch does not support the GigaStack
loop-breaking algorithm, or the link between the two GigaStack GBICs is broken. Under this
condition, a GigaStack loop topology is not automatically detected, and the connectivity between
switches in the stack could be lost.
Recommended Action If loop topology is used in the GigaStack, make sure that the latest software is
running on all switches in the stack. Verify that the GigaStack GBICs involved are functioning.
Error Message GIGASTACK-6-LOOP_BROKEN: Link loss is detected in the Gigastack
loop\nLink 2 of the Gigastack GBIC in [chars] is re-enabled.
Explanation A loop formed by GigaStack modules is broken because of link loss. Link 2 of the master
loop breaker is re-enabled to replace the broken link
Recommended Action No action is required.
Error Message GIGASTACK-6-LOOP_DETECTED: Gigastack GBIC in [chars] is selected as
Master Loop Breaker. \nLink 2 of the Gigastack GBIC is disabled to break the loop.
Explanation
A loop is detected in the GigaStack, and this GigaStack GBIC is selected as the master
loop breaker. Link 2 of this GigaStack GBIC is disabled to break the loop.
Recommended Action No action is required.
HW_MEMORY Messages
This section contains the hardware memory error messages.
Error Message HW_MEMORY-3-READMEMFAIL: \n[chars]: Failed to read [chars] from ASIC.
Explanation
Failed to read memory from hardware.
Recommended Action If this is happening with all features on the switch, this is a hardware failure.
Copy the error message exactly as it appears on the console or in the system log. Enter the show
tech-support command to gather data that might provide information to determine the nature of the
error. If you cannot determine the nature of the error from the error message text or from the show
tech-support output, contact your Cisco technical support representative, and provide the
representative with the gathered information.
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