[c-nsp] BFD on port channel

[Marc Binderberger]

Hello everyone,

I used c7600s72033-advipservices-mz.122-33.SRE4  to run BFD on
port-channels. So yes, there are IOS versions.

While running a single BFD session over a bundle has obvious limitations
it is still what all the vendors have implemented. Kind of smallest
common denominator as no standard exists to define what "BFD on a
bundle" should be. So to be clear, every implementation is proprietary.
But the single-session method luckily interoperates.

IOS-XR and NX-OS have two different modes on offer, the one with a
single BFD session per bundle and one with a BFD session per member link.


Regards, Marc



> Geert,
> 
> > 
> > so no, forget BFD and portchannels :-)
> > 
> 
> not so quickly :-) On NX-OS as well as IOS-XR, two platforms/OS where we
> have been running BFD sessions on the linecards, we do support BFD on
> channels/bundle, albeit in a proprietary fashion as this is not (yet?)
> standardized. As we're still using Layer 3 BFD pkts, now running over
> each bundle/channel member, the topologies supported by the specific BFD
> over channel implementations are limited, on IOS-XR we can only do
> back-to-back bundles (i.e. between two XR devices), NX-OS is a bit more
> flexible in this regard. 
> 
> So BFD and portchannels is still tricky and limited to some platforms
> and topologies, but it's certainly not impossible. 
> 
> 	oli
> 
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-- 
Marc Binderberger        <marc at sniff.de>        Powered by *BSD ;-)