Hi Guys
a switch port is shutdown, but when i use NO SHUTDOWN command it is working and shows administratively down.
like this command does not affect on it. i should enable this port? what can i do
btw, port is not in errdisable and portfast is enabled.
1. Clear the logs;
2. Un-shut the interface
3. Wait for 5 seconds;
4. Post the "sh logs".
4d17h: Gi0/5 can't be brought up because it failed POST in loopback test
Try #clear interface Gi0/5
Otherwise https://supportforums.cisco.com/thread/2153153
Best Regards
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