Chapter 9. Nortel Networks Layer 2/3 GbE Switch Module troubleshooting 159
9.3.2 Data collection
In this particular step, it might be necessary to collect additional information to help isolate
problem cause as noted in the following sections.
Test connectivity
Use connectivity testing tools such as ping, traceroute, and Telnet
Note error messages that appear
Details from affected users
Ask more detailed questions:
Has anything changed recently?
How often is the problem occurring?
Is the problem readily reproduceable?
Is it occurring intermittently or at regular intervals?
Nortel GbESM (Alteon OS) switch dumps
Collect the following dump types:
TechSupport dump
– /maint/tsdmp
– Includes output from the following dumps:
• Configuration dump (/cfg/dump)
• Information dump (/info/dump)
• Statistics dump (/stats/dump)
Panic dump
– Manually force a panic if switch hangs
• /maint/panic
• <CTRL-SHIFT-”-”>
– /maint/uudmp
– Includes a core dump of memory registers
Trace buffers
– Display switch processor trace buffer contents
/maint/debug/sptb <port#>
– Display the management processor trace buffer contents
/maint/debug/tbuf <port#>
– Display the snap trace buffer contents
/maint/debug/snap <port#>
– Send traces to GbE Technical Support as requested
Port diagnostics
Perform a port burn-in test to check for switch port hardware problems. You may also
consider running port diagnostics from maintenance kernel.
Note: If file size != 65 KB, then the panic file is no good.
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