[j-nsp] L3VPN/RR/PE on Same router

[adamv0025 at netconsultings.com]

> From: Youssef Bengelloun-Zahr [mailto:bengelly at gmail.com]
> Sent: Friday, August 17, 2018 3:43 PM
> To: Robert Raszuk
> Cc: adamv0025 at netconsultings.com; Saku Ytti; Juniper List
> Subject: Re: [j-nsp] L3VPN/RR/PE on Same router
> 
> Hi,
> 
> 
> 
> Le 17 août 2018 à 16:28, Robert Raszuk <robert at raszuk.net> a écrit :
> 
> >> and that thing would then crash BGP on RRs, can't afford that happening.
> >
> > Then best thing is to run two or three RRs in parallel each using
> > different BGP code base - even for the same AFI/SAFI pair
> >
> > I am seeing number of networks running single vendor RRs and when
> > things melt they run around and claim that the problem was was really
> > so rear and unexpected :) Well usually bugs are of unexpected nature  ....
> 
> And I have seen the opposite, ie networks running multiple vendor RRs,
> ending up with crashs because of buggy BGP implementations.
> 
> At the end of the day, it is a question of tossing a coin and hopping it will fall
> on the right side.
> 
It's about increasing the odds of it to fall on the right side,

Yes you can have multiple vendors that have the same quagga/bird BGP message parser code,
But comparing say XR and Junos, judging from the rest of the inner workings I could experience empirically, I'd say they are sufficiently different implementations.
  

adam 

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