ii
Troubleshooting ports ····································································· 22
Fiber port remains in down state ································································································· 22
Symptom ························································································································· 22
Troubleshooting flowchart ··································································································· 22
Solution ··························································································································· 23
Copper port remains in down state ······························································································ 24
Symptom ························································································································· 24
Troubleshooting flowchart ··································································································· 24
Solution ··························································································································· 24
Non-H3C transceiver module ······································································································ 25
Symptom ························································································································· 25
Troubleshooting flowchart ··································································································· 25
Solution ··························································································································· 25
Transceiver module does not support digital diagnosis ····································································· 26
Symptom ························································································································· 26
Troubleshooting flowchart ··································································································· 27
Solution ··························································································································· 27
Error frames (for example, CRC errors) on a port ············································································ 28
Symptom ························································································································· 28
Troubleshooting flowchart ··································································································· 28
Solution ··························································································································· 28
Failure to receive packets ·········································································································· 30
Symptom ························································································································· 30
Troubleshooting flowchart ··································································································· 30
Solution ··························································································································· 30
Failure to send packets ············································································································· 32
Symptom ························································································································· 32
Troubleshooting flowchart ··································································································· 32
Solution ··························································································································· 32
Related commands ·················································································································· 33
Troubleshooting system management ················································ 34
High CPU utilization ·················································································································· 34
Symptom ························································································································· 34
Troubleshooting flowchart ··································································································· 35
Solution ··························································································································· 35
High memory utilization ············································································································· 37
Symptom ························································································································· 37
Troubleshooting flowchart ··································································································· 37
Solution ··························································································································· 37
Related commands ·················································································································· 38
Troubleshooting other issues ···························································· 39
Layer 2 forwarding failure ·········································································································· 39
Symptom ························································································································· 39
Troubleshooting flowchart ··································································································· 39
Solution ··························································································································· 40
Related commands ············································································································ 42
Layer 3 forwarding failure ·········································································································· 43
Symptom ························································································································· 43
Troubleshooting flowchart ··································································································· 44
Solution ··························································································································· 44
Related commands ············································································································ 45
Protocol flapping ······················································································································ 45
Symptom ························································································································· 45
Troubleshooting flowchart ··································································································· 45
Solution ··························································································································· 45
VXLAN configuration failure ······································································································· 46
Symptom ························································································································· 46
Troubleshooting flowchart ··································································································· 47
Solution ··························································································································· 47
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