[j-nsp] Virtual route reflector physical layout

[Duane Grant]

Juniper released BGP ORR for ISIS in 15.1F4:

Support for BGP Optimal Route Reflection (BGP-ORR) (MX Series)—Starting
with Junos OS Release 15.1F4, you can configure BGP-ORR with IS-IS as the
interior gateway protocol (IGP) on a route reflector to advertise the best
path to the BGP-ORR client groups by using the shortest IGP metric from a
client's perspective, instead of the route reflector's view



On Fri, May 6, 2016 at 12:04 PM, Mark Tinka <mark.tinka at seacom.mu> wrote:

>
>
> On 6/May/16 17:53, Clinton Work wrote:
>
> > NANOG65 had a couple of useful presentation (video presentation links
> > via the agenda) about large scale RR deployment and shadow vRRs.  The
> > Juniper shadow vRR technique is interesting as you can deliver all your
> > vRRs from two or three central data center locations.
> >
> > https://www.nanog.org/meetings/nanog65/agenda
> >
> >
> https://www.nanog.org/sites/default/files/tuesday_tutorial_bothra_large-scale-bgp.pdf
> >
> https://www.nanog.org/sites/default/files/wednesday_general_szarecki_fire-water.pdf
>
> Ouch, that seems overly complex, to be honest. And fragile.
>
> I think BGP ORR would be a much more elegant solution than a "shadow" RR:
>
>
> https://tools.ietf.org/html/draft-ietf-idr-bgp-optimal-route-reflection-11
>
> AFAIK, Cisco have an implementation in IOS XR for the ASR9000. I'm
> pushing them hard for IOS XE/CSR1000v as well. I think Juniper were
> planning a release around Junos 16.
>
> I don't generally like to centralize things, and certainly not RR's.
> Complete backbone link failures where ever your centralized RR's are can
> take out your entire routing domain very quickly.
>
> Virtual RR's makes the deployment of RR's cheap, because servers are
> cheaper than routers, pound for pound. So why be concerned about the
> (minimal) costs of decentralization if it guarantees snoring at 3AM?
>
> Mark.
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