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Webcast-Catalyst9k
New Member

Line protocol in/out Trunk port Cat3560

I got two switches interconnected on ethernet ports and trunked useing dot1q. They keep changing status from protocol up to down not always the same interval either. Cant paste a config so ask me specific things to diagnose the issue please.

3 REPLIES

Re: Line protocol in/out Trunk port Cat3560

Hi

Check the cable,speed,duplex settings.

Thanks

Mahmood

New Member

Re: Line protocol in/out Trunk port Cat3560

Duplex and speeds are the same. Cable has been checked. Could it be a possible power issue. We are using generators to power the area we dont have an ups yet. I just want to make sure it couldn't be anything else.

Cisco Employee

Re: Line protocol in/out Trunk port Cat3560

Hi Friend,

If it is a power issue it will reload the whole switch and not one particular interface.

So can you check for some errors on the interface if you observe any? Also cehck if you see something in logs? Have you also configured errdisable recovery?

Regards,

Ankur

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