[c-nsp] UDLD vs Auto-neg

[Tim Durack]

A question that's been bugging me for a while: what does UDLD give me
that running auto-neg on both sides of a link doesn't? If I run auto,
link drops if the pathway goes one-way, and won't renegotiate until
the pathway is re-established. Isn't that all UDLD does?

Perhaps there are some failure modes I'm not considering. Or maybe it
has more to do with not running auto on infrastructure links.

Comments would be appreciated!

Tim:>