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3800 Switch port shows status as up, and LED's are ON but does not forward traffic

 
alphonse.stanislaus
Occasional Contributor

‎08-28-2013 11:50 PM

‎08-28-2013 11:50 PM

3800 Switch port shows status as up, and LED's are ON but does not forward traffic

We have a 3800 Switch port shows status as up, and LED's are ON but does not forward traffic.  This occurs in a 2 or 3 member stack.  Physically removing the ethernet cable does not cause the LED's to change from their ON to OFF state and neither does re-connecting the cable.

 

Also, a "show mac-address <affected-port>" shows no entry for a device that was known to have been there previously.

 

Moving the cable from the affected port to a new port on the same member (not sure which port was used as new port) does re-establish traffic for the remote device.

 

This appears to happen in a contiguous group of N ports.  Where we believe N is either 4 or 8.

 

We have seen this behaviour on several different stacks on the same Customer site.  They have many 3800 stacks of between 2 and 3 or 4 switches in each stack.

 

Version of firmware is KA15.09.0019

  

Any suggestions?

 

 

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