[f-nsp] Foundry and Cisco UDLD different?

[Mike Allen]

Chris, yeah, that is the other reason to use it, exactly what you are
describing.  Look into LACP, aka 802.3ad link aggregation, it should do the
same thing, although the failover might be slightly slower.

Mike

On Jan 7, 2008 9:50 AM, Christian Bering <CB at nianet.dk> wrote:

>  Hi Mike et al,
>
> >From: foundry-nsp-bounces at puck.nether.net on behalf of Mike Allen
>
> >UDLD is what you are enabling by using the link-keepalive commands.  It
> >references Uni-Directional Link Detection, and this is incompatible
> between
> >vendors, as there is no universal standard.
>
> Bugger.
>
> There's some DWDM equipment in between the two boxes and we had a bad MUX
> that meant the signal was too weak in the one direction. The Foundry that
> received the signal saw the interface as down (-31 dBm) but was still
> sending out light so the remote end (Cisco) kept the interface up.
>
> A situation where UDLD would have come in handy.
>
> Oh well - thanks for the answers.
>
> -Christian
>
>
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