[c-nsp] UDLD vs Auto-neg

[Church, Charles]

I think UDLD was originally designed for fiber, where there is no
auto-neg.   

Chuck 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Tim Durack
Sent: Wednesday, August 22, 2007 1:12 PM
To: Cisco Mailing list
Subject: [c-nsp] UDLD vs Auto-neg

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:>
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