[c-nsp] BFD w/ static routes

[Pekka Savola]

Speaking of which, when will BFD w/ static routes before available on 
IOS?  JunOS has had it for quite a while now..

We'd like to provide backup connectivity to customers using this 
mechanism.

---------- Forwarded message ----------
Date: Thu, 4 Aug 2005 14:32:38 +0200
From: martin schneidhofer <martin.schneidhofer at gmx.net>
To: juniper-nsp at puck.nether.net
Subject: AW: [j-nsp] BFD advice

hi all,

are there any experience in BFD operability
between juniper and cisco equipment -
especially with ospf ?

bye,
 			/martin

> -----Ursprüngliche Nachricht-----
> Von: juniper-nsp-bounces at puck.nether.net
> [mailto:juniper-nsp-bounces at puck.nether.net] Im Auftrag von
> Lewis, Charles
> Gesendet: Mittwoch, 3. August 2005 18:50
> An: George Yalamov; juniper-nsp at puck.nether.net
> Betreff: RE: [j-nsp] BFD advice
>
> We run it pretty extensively.  We've found that the timer
> itself really shouldn't go much below 75 ms and that a
> multiplier of four has proven safest (applied over various
> flavors of Ethernet within 100km or so).
> When we've tried to run much tighter we've hit situations
> where ppmd apparently isn't getting enough CPU time and
> periodic false link failures occur.  In other words, your lab
> conclusions seem to be consistent with our experiences.
>
> There have been rumblings about putting bfd into the PFE -
> this would probably yield much better detection times and
> improve stability.  I don't know whether/if this is on any
> roadmaps, though.
>
> I don't know if you plan to run them but there's a pretty
> significant caveat with BFD on J-series boxes.  Timer values
> that are fine on our M boxes have proven unstable on the
> J-series.  Roughly speaking we've found stability around 800
> ms or so (~200ms x 4).  We've been led to understand that
> this is a function of how the kernel is prioritizing locally
> terminating traffic that's specific to the platform.
> Hopefully this will be addressed soon.
>
> CHL
>
> -----Original Message-----
> From: juniper-nsp-bounces at puck.nether.net
> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of
> George Yalamov
> Sent: Wednesday, August 03, 2005 11:45 AM
> To: juniper-nsp at puck.nether.net
> Subject: [j-nsp] BFD advice
>
>
>
> Hi all,
>
> 	Does any one have real life experance with BFD, tunning
> timers, measurement of traffic disruption between 2 end
> points, convergance time
>
> in IGP (ISIS for example).
>
> I've tested this feature in lab environment with some M
> boxes, and the minimum time of traffic interruption was 200 -
> 400ms measured with iperf.
>
> Any ideas?
>
>
> regards
> George
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