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Webcast-Catalyst9k
New Member

All lights go amber

I have a 3750 switch that, every once and a while, all the lights go amber at once which blocks all ports for a few seconds. I am wondering if "spanning-tree portfast bpduguard default" has anything to do with this problem. I also have portfast turned on for each indivual port which does not connect to a switch.

5 REPLIES
Hall of Fame Super Bronze

Re: All lights go amber

What does the log say ?

New Member

Re: All lights go amber

I have swamped out the switch once and both times there have been no error messages in the logs.

Hall of Fame Super Bronze

Re: All lights go amber

Any errors reported on the interface ?

New Member

Re: All lights go amber

Uplink interface is clean and there doesn't seem to be any abnormal errors on any other interface.

Hall of Fame Super Bronze

Re: All lights go amber

Interesting, if the switch is blocking all ports, it sounds like a spanning-tree issue.

Do you have another switch connected to this switch ?

Can we see this switch config ?

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