What could cause constant up/down on certain links?

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Jan 21st, 2008
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I have a 3524 switch that constantly is up/downing on certain interfaces. These interfaces are VLAN'd and have VoIP phones plugged into them. Their power is through a module, not the interface.


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Edison Ortiz Mon, 01/21/2008 - 09:55
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You may want to check for speed/duplex mismatches. If the phones are hard-code to 100/FD, be sure to do the same on the switchports.

Check the counter on those interfaces for incrementing errors.





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