Hi folks,

I'm scratching my head with some RR configuration, and I'd like your feeling on 
it. Is it correct to configure one router to be RR for different clusters? Does 
it reflects correctly routes from one cluster to another?

Let's have an example: You have on one side a dual RR (router A and B, cluster 
1) for some routers, on the other side two other RR (router C and D, cluster 2) 
for some other routers. As they are all part of the same AS, usually you full 
mesh the 4 RRs together.

Now, you want to create for some reasons another cluster (cluster 3) including 
those 4 RRs (routers A, B, C and D) and some new clients.

Does it work to have on A, B, C and D 2 different clusters configured? Is there 
any recommendation regarding the peering between those 4 RRs (a full mesh 
within that new cluster, or a full mesh in another group without cluster 
definition)? I guess having them in the same cluster could reduce the routes 
exchange between them (same cluster-list so they drop the routes learned from 
the cluster). Will (A,B) reflects to cluster 1 the routes learned from cluster 
3, and vice-versa?

I guess it works, but I have never seen such a design, nor configuration 
anywhere...


Kind Regards,


Stephane.
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