25
<Sysname> display diagnostic-information
Save or display diagnostic information (Y=save, N=display)? [Y/N]:Y
Copper port remains in down state
Symptom
A 10/100/1000Base-T GE copper port remains in down state.
Troubleshooting flowchart
Figure 12 Troubleshooting copper port's failure to come up
Solution
To resolve the issue:
1.
Verify that the speed and duplex mode of the local port match the speed and duplex mode of
the peer port:
a.
Execute the
display interface brief
command to examine whether the speed and
duplex mode of the port match the speed and duplex mode of the peer port.
Speed/duplex match
on local and peer port?
No
Yes
No
Yes
No
Yes
Yes
No
No
Yes
Yes
No
No
Yes
Yes
No
Contact the support
Copper port remains in down
state
End
Replace peer port
Resolved?
Network cable correct?
Local port
operating correctly?
Replace local port
Replace network
cable
Configure matching
speed/duplex
Resolved?
Resolved?
Resolved?
Peer port
operating correctly?
Summary of Contents for S5850-54QS
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