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3750 Port NOT Err-Dis but not working either?!?

Hi,

I've recently had a number of switchports cease to work on 3750s arround campus; I would have thought they should have gone ERR-DIS but they just sit in UP/DOWN until the switch is restarted and then work as normal, interface shut /no shut doesn't do anything.

Have you any Idea:

i)  what is likley to cause this?

ii) Is there any way to recover the port without restarting the switch?

Thanks,

Roger.

6 REPLIES 6
Contributor

3750 Port NOT Err-Dis but not working either?!?

Roger Farrington wrote:

Hi,

I've recently had a number of switchports cease to work on 3750s arround campus; I would have thought they should have gone ERR-DIS but they just sit in UP/DOWN until the switch is restarted and then work as normal, interface shut /no shut doesn't do anything.

Have you any Idea:

i)  what is likley to cause this?

ii) Is there any way to recover the port without restarting the switch?

Thanks,

Roger.

What's on the other end of the port? Could the attached device be shutting down/suspending in some way and dropping the switch port?

Cheers.

3750 Port NOT Err-Dis but not working either?!?

Sorry for the delay,

We have ahad it happen with a few devices PCs and Control systems, it doesn't happen very often at all - the devices are working fine, moving the patch cord to another switch port solves the issue, but the switches need restarting before the original port will work again.

Hall of Fame Community Legend

3750 Port NOT Err-Dis but not working either?!?

Can you post the output to the following commands please:

1.  sh version;

2.  sh post

Highlighted
Beginner

3750 Port NOT Err-Dis but not working either?!?

Roger,

Did you ever get an answer regarding this issue? Was it a bug? I'm guessing that an IOS upgrade will solve the issue but I'm just curious if you figured it out? I'm running 12.2(40)SE on a stack of 3750's and see the same thing.

Craig

Beginner

3750 Port NOT Err-Dis but not working either?!?

Any answer on this? I'm also seeing the same behavior.

Hall of Fame Community Legend

3750 Port NOT Err-Dis but not working either?!?

Patrick,

It's best if you create a new thread. 

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