From: Marko Milivojevic (markom@markom.info)
Date: Wed Nov 26 2008 - 09:15:27 ARST
On Tue, Nov 25, 2008 at 21:34, Narbik Kocharians <narbikk@gmail.com> wrote:
!
> But i don't know of a provider that configures the cluster-id, typically a
> RR-client must be a client in at least 2 or more clusters, this way the
> provider maximizes its availability.
It's actually very common practice when deploying hierarchical route
reflection (global RR's reflect to regional RR's which reflect to
local RR's and vice-versa).
In this kind of scenario, where redundant route-reflectors are at the
same time route-reflector clients, forming a loop is very real danger.
The "only" way to prevent these loops is careful cluster-id planning
and I'm more than certain that these are set manually to values other
than BGP router-id :-).
-- Marko CCIE #18427 (SP) My network blog: http://cisco.markom.info/Blogs and organic groups at http://www.ccie.net
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