Extreme Networks ExtremeWare Version 7.8, Troubleshooting Manual

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78 Advanced System Diagnostics and Troubleshooting Guide
Diagnostics
Backplane Health Check Diagnostic Results—Example 4. Example 4 shows a report for MSM-A
again, but with small numbers of missed packets on channels going to different slots.
In example 4, the small numbers of missed packets (fewer than five) indicate what is most likely not a
serious hardware problem. Either the CPU was too busy during that period and missed a round of
tests, or the hardware experienced an intermittent error. That the CPU is too busy to run the tests might
indicate other network problems that might be investigated if the situation persists.
Total Tx Total Rv Total miss Error Pkt Diag fail Last fail time
Port 1: 6140 6137 3 0 0 03/08/2005 05:28:51
Port 2: 0 0 0 0 0
Port 3: 0 0 0 0 0
Port 4: 0 0 0 0 0
Port 5: 0 0 0 0 0
Port 6: 0 0 0 0 0
Port 7: 214020 214018 2 0 0 03/08/2005 05:28:51
Port 8: 214010 214007 3 0 0 03/08/2005 05:28:51
Port 9: 6140 6137 3 0 0 03/08/2005 05:28:51
Port 10: 0 0 0 0 0
Port 11: 0 0 0 0 0
Port 12: 0 0 0 0 0
Port 13: 0 0 0 0 0
Port 14: 0 0 0 0 0
Port 15: 214020 214018 2 0 0 03/08/2005 05:28:51
Port 16: 214010 214007 3 0 0 03/08/2005 05:28:51
Port 17: 6140 6137 3 0 0 03/08/2005 05:28:51
Port 18: 0 0 0 0 0
Port 19: 0 0 0 0 0
Port 20: 0 0 0 0 0
Port 21: 0 0 0 0 0
Port 22: 0 0 0 0 0
Port 23: 214020 214018 2 0 0 03/08/2005 05:28:51
Port 24: 214010 214007 3 0 0 03/08/2005 05:28:51
Port 25: 6140 6137 3 0 0 03/08/2005 05:28:51
Port 26: 0 0 0 0 0
Port 27: 0 0 0 0 0
Port 28: 0 0 0 0 0
Port 29: 0 0 0 0 0
Port 30: 0 0 0 0 0
Port 31: 214020 214018 2 0 0 03/08/2005 05:28:51
Port 32: 214010 214007 3 0 0 03/08/2005 05:28:51
Analyzing the Results
•
In the output of the
show diagnostics
command:
— Small counts of missed packets might mean nothing more than that the CPU was busy and a
packet was dropped; excessive numbers of missed packets indicate a systematic problem that
must be isolated and resolved.
— Corrupted packets might occur occasionally; excessive numbers of corrupted packets indicate a
systematic problem that must be isolated and resolved.
• Backplane health check failures might indicate a faulty transceiver or MAC device on one of the
MSMs or on an I/O module, but might also be the result of other problems.