[c-nsp] Fast UDLD timers in SXI?

[David Hughes]

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
> --
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> Gert Doering - Munich, Germany                             gert at greenie.muc.de
> fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de