Ports Going up and Down

[remmus]

HI All,

I'm running a switched environment and have a kiwi syslog server. My logs shows ports going up and down eventhough the workstation connected is not being rebooted. I was wondering what could be triggering this. I've pasted a copy of the log. I hope you guys could give me a feedback regarding this. Any help is much appreiated. Thanks!

2003-07-24 06:28:26 Local5.Error 164.179.168.20 2699: *Mar 11 15:02:26.446 UTC: %LINK-3-UPDOWN: Interface FastEthernet0/17, changed state to up

2003-07-24 06:28:27 Local5.Notice 164.179.168.20 2700: *Mar 11 15:02:26.933 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/17, changed state to up

2003-07-24 06:28:29 Local5.Error 164.179.168.20 2701: *Mar 11 15:02:29.681 UTC: %LINK-3-UPDOWN: Interface FastEthernet0/17, changed state to down

2003-07-24 06:28:30 Local5.Notice 164.179.168.20 2702: *Mar 11 15:02:29.938 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/17, changed state to down

2003-07-24 06:28:31 Local5.Error 164.179.168.20 2703: *Mar 11 15:02:31.222 UTC: %LINK-3-UPDOWN: Interface FastEthernet0/17, changed state to up

2003-07-24 06:28:31 Local5.Notice 164.179.168.20 2704: *Mar 11 15:02:31.951 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/17, changed state to up

2003-07-24 06:28:32 Local5.Error 164.179.168.20 2705: *Mar 11 15:02:32.706 UTC: %LINK-3-UPDOWN: Interface FastEthernet0/17, changed state to down

2003-07-24 06:28:33 Local5.Notice 164.179.168.20 2706: *Mar 11 15:02:32.957 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/17, changed state to down

2003-07-24 06:28:34 Local5.Error 164.179.168.20 2707: *Mar 11 15:02:34.258 UTC: %LINK-3-UPDOWN: Interface FastEthernet0/17, changed state to up

[burleyman]

What are the speed and duplex settings on fe0/17 and the workstation's NIC? make sure they are the same. Also if you have them set to Auto try hard-coding them. Have you moved the work station to another port on the switch? What is the length of cable from the switch to the workstation?

Just a start...

Cheers,

Burleyman

[DWAM_2]

Like says Burleyman,

-> Verify the duplex and speed setting in both sides.

-> Lenght of cable.

-> If the NIC is configure to sleep or not ?

-> Are there errors on this interface (show interface fa0/17) ?

Best Regards.

[r.redd]

Also check were you are logging the messages, you might be logged them locally and filling up the que. That will also kill the interface.

[Prashanth Krishnappa · Accepted solution]

The following page should help

http://www.cisco.com/warp/public/473/46.html#maintaining