[j-nsp] BGP full mesh or route reflector

[Mark Tinka]

On 06/12/2025 13:08, nsp--- via juniper-nsp wrote:

> Hi,
>
> but please take into consideration that your iBGP Sessions will flap 
> once you configure the first rr session on a box if you use vpn families:
> https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/topic-map/bgp-session-flaps.html 
>
>
> btw:
> We run 14 routers (MX204-960, peak was 25 devices) with a full table 
> each in a full meshed setup (IS-IS/RSVP/MPLS, no SR).
> Works fine since many years and I remember no issue that a rr would 
> have avoided.
> On the other side we already had issues (long time ago in an other 
> setup with quagga rr and Catalyst 6500 + x86 routers) with a rr setup 
> in which router A was not able to reach router B but both reached the RR.
> So I do not think that a full mesh is a no-go for small setups.

A full-mesh setup is not a no-go for small setups, or even large setups :-).

You just have to decide if you want to defer ease to later, or now.

Mark.