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New Member

Cannot ping SVI from fiber downlink switch

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?

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4 REPLIES
New Member

Cannot ping SVI from fiber downlink switch

is there anyone can help on it?

New Member

Cannot ping SVI from fiber downlink switch

Hello

HAve you looked at spanning tree :

show spanning-tree blockedports

Regards

Jean-Luc

New Member

Cannot ping SVI from fiber downlink switch

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.

New Member

Cannot ping SVI from fiber downlink switch

HI , Have you check properly that replaced switch is a part of switch stack.

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