[c-nsp] Fast UDLD timers in SXI?

[Mauritz Lewies]

I've not had much chance to play with it but will Ethernet CFM not work
for this?





On Wed, 2009-02-04 at 08:49 +1000, David Hughes wrote:

> Yup, that's exactly the situation.  STP will work around some of the  
> problem caused by this but if you are presenting an etherchannel over  
> multiple xconnects you can't pick up the link failure of part of the  
> etherchannel without UDLD.  We did some initial proof of concepts with  
> 2900s running 2 second timers and it was great.  Imagine the look on  
> my face when we found out that 6500s don't have the functionality of a  
> $1,000 access switch .....
> 
> So, is the config option on SXI still 7 seconds at best?
> 
> 
> Thanks
> 
> David
> ...
> 
> 
> On 03/02/2009, at 7:45 PM, Thomas Dupas wrote:
> 
> > I assume it's a L2 link (EoMPLS), so BFD won't help much.
> >
> > We're in the same situation, also stuck with UDLD timers and 2  
> > parallel EoMPLS xconnects. I can't get the convergence lower then 20  
> > seconds with the default UDLD, so I'm also hoping for fast UDLD
> >
> > Best Regards,
> >
> > Thomas
> >
> > ________________________________________
> > Van: cisco-nsp-bounces at puck.nether.net [cisco-nsp-bounces at puck.nether.net 
> > ] namens Gert Doering [gert at greenie.muc.de]
> > Verzonden: dinsdag 3 februari 2009 8:15
> > Aan: David Hughes
> > CC: Cisco NSP ((E-mail))'
> > Onderwerp: Re: [c-nsp] Fast UDLD timers in SXI?
> >
> > Hi,
> >
> > On Tue, Feb 03, 2009 at 04:30:50PM +1000, David Hughes wrote:
> >> Can someone verify if 12.2(33)SXI offers fast UDLD timers (i.e. down
> >> to 1 second) or if we are still stuck with the old 7 sec timers.  We
> >> can do 1 sec UDLD on 2900 class switches so I hope we see it in the
> >> "premier switching platform" some time soon.  We need some way to  
> >> pick
> >> up a link failure at the far end of an EoMPLS xconnect in a  
> >> reasonable
> >> time.
> >
> > Can you use BFD?
> >
> > (Yes, this is not answering your question - I don't know the answer  
> > - but
> > it might be an alternative approach if this a layer 3 link)
> >
> > gert
> > --
> > USENET is *not* the non-clickable part of WWW!
> >                                                           //www.muc.de/~gert/
> > Gert Doering - Munich, Germany                             gert at greenie.muc.de
> > fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
> 
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