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Contents
Introduction ····················································································· 1
General guidelines ····················································································································· 1
Collecting log and operating information ························································································· 2
Collecting common log messages ··························································································· 2
Collecting diagnostic log messages ························································································· 3
Collecting operating statistics ································································································· 3
Contacting technical support ········································································································ 5
Troubleshooting hardware ·································································· 5
Unexpected switch reboot ············································································································ 5
Symptom ··························································································································· 5
Troubleshooting flowchart ····································································································· 6
Solution ····························································································································· 6
Operating power module failure ···································································································· 7
Symptom ··························································································································· 7
Troubleshooting flowchart ····································································································· 7
Solution ····························································································································· 7
Newly installed power module failure ······························································································ 8
Symptom ··························································································································· 8
Troubleshooting flowchart ····································································································· 8
Solution ····························································································································· 8
Fan tray failure ·························································································································· 9
Symptom ··························································································································· 9
Troubleshooting flowchart ····································································································· 9
Solution ····························································································································· 9
Related commands ·················································································································· 10
Troubleshooting ACL ······································································ 10
ACL application failure with an error message ················································································ 10
Symptom ························································································································· 10
Troubleshooting flowchart ··································································································· 11
Solution ··························································································································· 11
ACL application failure without an error message ············································································ 11
Symptom ························································································································· 11
Troubleshooting flowchart ··································································································· 12
Solution ··························································································································· 12
Packet loss or forwarding failure ·································································································· 13
Symptom ························································································································· 13
Troubleshooting flowchart ··································································································· 13
Solution ··························································································································· 14
Related commands ·················································································································· 15
Troubleshooting IRF ······································································· 15
IRF fabric establishment failure ··································································································· 16
Symptom ························································································································· 16
Troubleshooting flowchart ··································································································· 16
Solution ··························································································································· 17
Related commands ·················································································································· 18
Troubleshooting Ethernet link aggregation ··········································· 19
Link aggregation failure ············································································································· 19
Symptom ························································································································· 19
Troubleshooting flowchart ··································································································· 20
Solution ··························································································································· 20
Related commands ·················································································································· 21
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