38
Troubleshooting flowchart
Figure 15 Troubleshooting CRC error packets on a port
Solution
1.
Perform a basic replacement test to remove link, interface module, and port problems.
a.
Remove link problems. For more information, see "
10-Gigabit SFP+ fiber port fails to come
b.
Execute the
display transceiver diagnosis interface
command multiple times
to view the Tx and Rx optical powers of the port. If CRC error packets on the port are caused
by the Tx/Rx power instability, troubleshoot the link.
2.
Identify whether the problem is known.
a.
See the known problem list in the S6890 switch series usage guidelines to identify whether
CRC error packets are caused by known problems. If CRC error packets are caused by
known problems, upgrade the software or install patches according to the problem
description and identify whether the problem of CRC error packets has been resolved.
b.
Troubleshoot the problems of port failure to come up, port flapping, and CRC error packets
on a port together. The three symptoms are sometimes related, and it is hard to locate the
root cause. When one of the problems occurs, as a best practice, troubleshoot the three
problems together.
3.
Execute commands in the following table to collect information and contact H3C Support.
Known problem?
No
Yes
No
Yes
CRC error packets exist on a
port
Collect information and
contact the support
End
Resolved?
Remove link, interface
module, and port
problems
Problem of local end?
Resolve according to the
known solution
Assist in joint
troubleshooting
Yes
No