[c-nsp] BFD bug in IOS SXF6

Rodney Dunn rodunn at cisco.com
Fri Jan 12 09:55:54 EST 2007


I'd say no from:

http://www.cisco.com/univercd/cc/td/doc/product/metro/me6500/122zu/ol_9584.htm

\x{2022}Release 12.2(18)ZU1:

\x{2013}Date of release: 30 oct 2006

\x{2013}Based on Release 12.2(18)ZU

\x{2022}Release 12.2(18)ZU:

\x{2013}Date of release: 03 Aug 2006

\x{2013}Based on Release 12.2(18)SXF3 


On Fri, Jan 12, 2007 at 12:05:49PM -0200, Rubens Kuhl Jr. wrote:
> What 12.2(18)ZU1 ?
> 
> 
> Rubens
> 
> 
> On 1/12/07, Rodney Dunn <rodunn at cisco.com> wrote:
> > Guys,
> >
> > Can you please try any BFD test on 12.2(33)SRA latest code and not SXF?
> >
> > There were some large changes to BFD and scheduling to improve this
> > and they will not be back ported to 12.2(18)SXF.
> >
> > Rodney
> >
> >
> >
> >
> > On Fri, Jan 12, 2007 at 01:07:43PM +0100, airflow wrote:
> > > Byrne, Cameron wrote:
> > >
> > > Hi all, I'm new to this mailinglist.
> > >
> > > > Long story short, BFD does not work well in SXF6 because of CPU
> > > > scheduler issues. I have a TAC case, but it is not going well.
> > > > Does anyone have  timer settings that they feel are stable?  I am
> > >
> > > I also had massive problems with this feature and also had a SR open regarding this. The outcome was unsatisfying, as there is just no value which will not trigger a "false positive" under every circumstance. The engineer said that you have to experiment in the live network or set up a lab which very much resembles your live network in every aspect and test there. It is also recommended to configure "process-max-time 20". The default value for that is 200msecs, which already covers 2-3 multipliers of BFD at 100msecs.
> > >
> > > In the end we ended up with disabling BFD. If you decide to use it, I would recommend to use conservative timing (300msecs intervals).
> > >
> > > Regards,
> > > Florian
> > >
> > > --
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