H3C S5560-EI Series Troubleshooting Manual

Also see for S5560-EI series: Installation guide

H3C S5560-EI Series Troubleshooting Manual Manual pdf 3 page image

iiSymptom ································································································································································· 21Troubleshooting flowchart ···································································································································· 22Solution ··································································································································································· 22Related commands ························································································································································· 23Troubleshooting ports················································································································································· 25Fiber port remains in down state ·································································································································· 25Symptom ································································································································································· 25Troubleshooting flowchart ···································································································································· 26Solution ··································································································································································· 26Copper port remains in down state ····························································································································· 28Symptom ································································································································································· 28Troubleshooting flowchart ···································································································································· 28Solution ··································································································································································· 28Non-H3C transceiver module ······································································································································· 29Symptom ································································································································································· 29Troubleshooting flowchart ···································································································································· 29Solution ··································································································································································· 29Transceiver module does not support digital diagnosis ····························································································· 30Symptom ································································································································································· 30Troubleshooting flowchart ···································································································································· 31Solution ··································································································································································· 31Error frames (for example, CRC errors) on a port ······································································································ 32Symptom ································································································································································· 32Troubleshooting flowchart ···································································································································· 32Solution ··································································································································································· 32Failure to receive packets ·············································································································································· 34Symptom ································································································································································· 34Troubleshooting flowchart ···································································································································· 34Solution ··································································································································································· 35Failure to send packets ·················································································································································· 36Symptom ································································································································································· 36Troubleshooting flowchart ···································································································································· 36Solution ··································································································································································· 36Related commands ························································································································································· 38Troubleshooting system management ······················································································································· 39High CPU utilization ······················································································································································ 39Symptom ································································································································································· 39Troubleshooting flowchart ···································································································································· 39Solution ··································································································································································· 39High memory utilization ················································································································································ 41Symptom ································································································································································· 41Troubleshooting flowchart ···································································································································· 41Solution ··································································································································································· 42Related commands ························································································································································· 42Troubleshooting other problems ································································································································ 43Layer 2 forwarding failure ············································································································································ 43Symptom ································································································································································· 43Troubleshooting flowchart ···································································································································· 44Solution ··································································································································································· 44Related commands ················································································································································ 48Layer 3 forwarding failure ············································································································································ 49Symptom ································································································································································· 49Troubleshooting flowchart ···································································································································· 50