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Webcast-Catalyst9k
New Member

Switch Failure

I had somene put a patch cable from one port to another port on a little DLINK switch and it shut down our Cisco 3550 Switches.I pulled out the cable on the the amber light and it started to work again.Was that a short or somethinkg from the cable on the DLINK?

2 REPLIES
Hall of Fame Super Gold

Re: Switch Failure

Steven

When they put the patch cable between two ports of the DKINK they created a loop in the layer 2 network. The 3550 stopped working in reaction to the loop and started working again when the loop was broken.

HTH

Rick

New Member

Re: Switch Failure

Thanks for info,I thought it was that..That is an easy way to mess up someones network A?Had me stumped for a while...

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