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3750G stack intermittent issues

Posted on 2010-09-09
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this morning the switch had no lights on any of the ports - it seems to have hung somehow
one of my colleagues rebooted it before I can check the console and now I've noticed that every few seconds the link state is changing - is that normal?
Sep  9 08:51:02: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state DOWN
Sep  9 08:51:03: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state UP
Sep  9 08:51:04: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state DOWN
Sep  9 08:51:05: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state UP
Sep  9 08:51:36: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state DOWN
Sep  9 08:51:37: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state UP
Sep  9 08:51:51: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state DOWN
Sep  9 08:51:52: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state UP

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Question by:gddl630
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Jimmy Larsson, CISSP, CEH earned 1000 total points
ID: 33635466
No, this is not normal. You have problem with either switch1 hardware or the cable connected to port 2 switch 1. I would first replace the stack cable to see if this resolves the problem, next replace the switch.

/Kvistofta
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by:ngravatt
ngravatt earned 1000 total points
ID: 33636645
I agree.  Sounds like a faulty piece of hardware. You could always trunk a port on one of the Gig interfaces of each switch to provide connectivity for the time being if you don't have another cable/switch laying around.
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