Hi
On 2811 router support only
NM-16ESW, NM-16ESW-PWR, NM-16ESW-1GIG, NM-16ESW-PWR-1GIG
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.
Regards,
Dharmesh Purohit