09-17-2013 12:07 AM - edited 03-07-2019 03:30 PM
I have three Cisco 3750G (#1, #2 and #3) stacked as core switch. Each switch has fiber ports downlink with Cisco 2960.
The problem is I cannot ping the SVI interface from 2960 if it's connected to the #2 switch with fiber cable. it works properly in last week before this problem happen.
It works if I uplink the 2960 with copper cable to any core switch, it also works if I connect 2960 to the fiber port of #1 or #3. It looks all fiber ports on the #2 switch cannot route data .
I tried to reload the #2 switch individually. 2960 can ping SVI for few minutes after reboot, then the problem comes again.
Is it a hardware problem or configuration issues?
09-18-2013 09:17 AM
is there anyone can help on it?
09-24-2013 03:56 AM
Hello
HAve you looked at spanning tree :
show spanning-tree blockedports
Regards
Jean-Luc
11-06-2013 11:45 PM
Hello ,
I'm appreciated for you replay. This problem was by replacing #2 swtich with a spare one, without changing the stack.
I think It should be hareware problem on Fiber data process module.
11-07-2013 12:03 AM
HI , Have you check properly that replaced switch is a part of switch stack.
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