Re: [j-nsp] Hardware configuration for cRPD as RR

[Thomas Scott via juniper-nsp]

Why not both add-path + ORR?
-- 

Thomas Scott
Sr. Network Engineer
+1-480-241-7422
tsc...@digitalocean.com


On Fri, Dec 8, 2023 at 11:57 AM Saku Ytti via juniper-nsp <
juniper-nsp@puck.nether.net> wrote:

> On Fri, 8 Dec 2023 at 18:42, Vincent Bernat via juniper-nsp
>  wrote:
>
> > On 2023-12-07 15:21, Michael Hare via juniper-nsp wrote:
> > > I recognize Saku's recommendation of rib sharding is a practical one
> at 20M routes, I'm curious if anyone is willing to admit to using it in
> production and on what version of JunOS.  I admit to have not played with
> this in the lab yet, we are much smaller [3.5M RIB] worst case at this
> point.
> >
> > About the scale, I said routes, but they are paths. We plan to use add
> > path to ensure optimal routing (ORR could be another option, but it is
> > less common).
>
> Given a sufficient count of path options, they're not really
> alternatives, but you need both. Like you can't do add-path , as
> the clients won't scale. And you probably don't want only ORR, because
> of the convergence cost of clients not having a backup option or the
> lack of ECMP opportunity.
>
> --
>   ++ytti
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Re: [j-nsp] Hardware configuration for cRPD as RR

[Thomas Scott via juniper-nsp]

Also very curious in this regard.

Best Regards,
-Thomas Scott


On Wed, Dec 6, 2023 at 12:58 PM Vincent Bernat via juniper-nsp <
juniper-nsp@puck.nether.net> wrote:

> Hey!
>
> cRPD documentation is quite terse about resource requirements:
>
> https://www.juniper.net/documentation/us/en/software/crpd/crpd-deployment/topics/concept/crpd-hardware-requirements.html
>
> When used as a route reflector with about 20 million routes, what kind
> of hardware should we use? Documentation says about 64 GB of memory, but
> for everything else? Notably, should we have many cores but lower boost
> frequency, or not too many cores but higher boost frequency?
>
> There is a Day One book about cRPD, but they show a very outdated
> processor (Sandy Lake, 10 years old).
>
> Is anyone using cRPD as RR with a similar scale and can share the
> hardware configuration they use? Did you also optimize the underlying OS
> in some way or just use a stock configuration?
>
> Thanks.
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