[c-nsp] UDLD vs Auto-neg

[Tim Durack]

Tell that to my Cisco(4908G-L3) and HP(4000/5406) switches. Seems to
work for me.

(Actually with the 4908 you have to set Auto or else you don't get
link detection  - the port will always show as up.)

Tim:>

On 8/22/07, Church, Charles <cchurc05 at harris.com> wrote:
> 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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