FA0/0 state detection

[markbowman]

Can I shutdown an interface if only 'transmit' side is bad? For ex., we have 2 switches connected with fiber and if we had trouble with one side of the fiber (transmit) side, the eigrp traffic in the router will not reroute traffic because it sees the correct route in the route table. It sees the correct route because the 'receive' from the far end switch is working.

I want the interface to shutdown if either transmit/receive is not working.

[dominic.caron · Accepted solution]

You need to configure UDLD

here the link if the switch is a 6500

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SXF/native/configuration/guide/udld.html

You'll find similar chapters in other switch configuration guide.

Please rate helpful post.

[markbowman]

This is what we were looking for. We will try it out. Thanks.