Viewing Diagnostics Results; Example Log Messages For Fdb Scan Diagnostic Failures; Example Fdb Scan Results From The Show Diagnostics Command - Extreme Networks BlackDiamond 6804 Troubleshooting Manual

Diagnostics

Viewing Diagnostics Results

Use the following commands to view information related to the FDB Scan diagnostic test:
show log
show diagnostics
show fdb remap
clear fdb remap
show switch

Example Log Messages for FDB Scan Diagnostic Failures

Look for the following types of messages in the log:
FDB Scan: max number of remaps (
This message indicates that the FDB scan cannot re-map any more FDB entries. The value num is the
maximum number of entries than can be remapped (should be 8), slot indicates the chassis slot, and
entry indicates the entry. The system health checker is invoked; the configured system health check
action will be taken.
If this error message appears many times on multiple slots, there might be a transceiver problem on
the master MSM. Run the transceiver diagnostics and check the results to determine whether the
MSM should be replaced.
entry
FDB Scan: entry
This message indicates that the diagnostic detected a corrupted portion of FDB memory, and that the
database entry entry was marked as unusable by the FDB scan routine. The module can continue to
operate normally with no loss of performance. Do not replace the module.
entry
FDB Scan: entry
This message indicates that the diagnostic detected a corrupted portion of FDB memory, but could
not remap that memory portion because it contains an entry that cannot be removed and relearned
automatically (for example, a static database entry). Operator intervention is required to correct this
problem. Use the
show fdb remap
marked with an "S," remapped entries are marked with an "R") and then take the appropriate action
to resolve the problem.

Example FDB Scan Results from the show diagnostics Command

FDB Scan results
Cardstate
slot 1 : Operational
slot 2 : Unknown
slot 3 : Unknown
slot 4 : Unknown
slot 5 : Unknown
slot 6 : Unknown
slot 7 : Operational
slot 8 : Operational
MSM-A : Operational
MSM-B : Operational
88
num
) exceeded. Calling sys-health-check.
marked 'remapped'
marked 'suspect'
command to identify the suspect entry (suspect entries are
NumFail NumScan
0 62
0 62
0 62
0 62
0 62
Entry LastFailTime
Advanced System Diagnostics and Troubleshooting Guide
slot entry