[c-nsp] UDLD - why is default 60 seconds?

[Hank Nussbacher]

On Thu, 23 Feb 2006, Saku Ytti wrote:

> On (2006-02-23 18:32 +0200), Hank Nussbacher wrote:
>
> > <http://www.cisco.com/en/US/products/hw/routers/ps368/products_configuration_guide_chapter09186a0080160ecf.html>
> >
> > Why is the default probe message time 60 seconds and in addition one can
> > only go as low as 7 seconds?  If a GE port suddenly becomes
> > unidirectional, I would like to know about in 1-2 seconds and not after 7
> > seconds, so that the link is forced down and OSPF turns to an alternate
> > path.  Or am I missing something?
>
>  Valid question, which I don't have answer to, I agree they're quite
> conservative. But I'd suggest that you'll solve your rapid IGP
> livelyness detection with BFD instead, UDLD only helps in very spesific
> problem, which should happen extremely rarely.

Thanks.  Will take up the suggestion.   -Hank

>
>  Also you may want to complement UDLD with STP loopguard, to cover
> another corner case (mainly STP software issues).
>
> >
> > Thanks,
> > Hank
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>
> --
>   ++ytti
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