2960-24TT-L Port Errors

Unanswered Question
Jun 4th, 2008

I just configured a 2960 switch with 3 VLAN's. I'm having some issues with interfaces when I go look at the system log. They are constantly going up and down.

Here is an example:

Description: Interface FastEthernet0/9, changed state to down

Explanation: The interface hardware went either up or down.

Recommended Action: If the state change was unexpected, confirm the configuration settings\n\ for the interface.


I have this problem too.
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Mark Yeates Wed, 06/04/2008 - 18:06

The log messages that you see are common when your logging is set to informational. If users are shutting down, booting, restarting a PC you will see this log entry. You should disregard this message unless it appears to be happening frequently, if so I would recommend checking out the device connected to that switchport.



challc2008 Wed, 06/04/2008 - 18:29

Thank you for your reply Mark. We connected two different laptops that work fine with no issues to multiple ports and the interface was generating these errors. However when I did a continuous ping to those two laptops not a single packet loss out of 2000 pings. So it is safe to say that my configuration is ok? I see these messages even if nothing is connected to the port. These errors show up as "Critical" errors.

Ryan Carretta Wed, 06/04/2008 - 23:55

Hi Mark,

What is on port 9? If this is a critical uplink, I'd say you have a problem on your hands, but, as the previous poster mentioned, if this is a user, there isn't anything to be worried about there. It will get printed whenever somebody connects/disconnects from the port.

You can try using the command 'no logging event link-status' on the interface to squelch the messages if desired.

challc2008 Thu, 06/05/2008 - 01:10

Mainly its fe01, 0/9 and 0/12 generating these errors. 1 and 9 had laptops connected to it. However nothing is connected to them right now, they are simply access ports. 12 we have a Server connected to it.

These critical errors are showing up under system messages and show up, if some thing is connected or not connected to the ports.

challc2008 Sun, 06/15/2008 - 05:21

Just wanted to let every one know that after working with Cisco TAC we are replacing that switch.


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