Hi, while playing in a lab with BGP RRs, I noticed that if a BGP session is already in place without any RR configuration and then I set up RRs, BGP sessions are reset. Although I didn't explicitly find this written in the RFC, I understand at least Cisco and Juniper do this.
My question is, why? Can't the RR simply send UPDATE messages for the new routes (possibly withdrawing old ones) so they have the ORIGINATOR and CLUSTER_ID attributes? Why is a session restart required?
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