UDLD configuration between a router and a switch

Unanswered Question
Feb 22nd, 2007

I am trying to setup udld running between a 2811 router and 3524 switch without much success. Between the two devices is a fibre circuit with media convertor on either side. The router and switch are connected via the media convertors by copper. There is a option to configure udld on the 3524 but not the 2811. Is there anyway it can be turned on on the router and is there anyway it can be verified that is working?

The reason for getting udld configured on either end is to hopefully ensure that if anything fails between the two devices we can be sure that the interfaces are pulled down. Is there a better mechanism to ensure this happens?

I have this problem too.
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purohit_810 Thu, 02/22/2007 - 14:15


On 2811 router support only


With Minimum 12.3(8) T IOS.


UDLD avalable on following modules.

(NME-16ES-1G-P, NME-X-23ES-1G-P, NME-XD-24ES-1S-P, NME-XD-48ES-2S-P

What module you have? Please tell me OR compare.

I am also attaching two files. It will give you better Idea related to UDLD AND 2811 Router switch Module.

If still you have any queries please let us know.


Dharmesh Purohit


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