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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: IBGP Question --- Router Reflector or iBGP Mesh
On 12-jan-05, at 9:06, Alexei Roudnev wrote: Are you sure? RR should just distribute routes. Route reflectors only propagate their idea of the best route for a destination. If this decision is based on eBGP-learned information such as the AS path this doesn't matter because all routers in the AS would make the same decision anyway, but if the IGP metric comes into play (which invariably happens in large networks) then all the reflector clients only see the route that is best based on the IGP metrics the reflector sees.RR do not make any route decisions, and (btw) iBGP do not make route decisions - they are mostly based on IGP routing. (Obviously the IGP metric will be different at the client, but the client doesn't see the other routes, so it can't make a different decision. The real fun starts when the next (intra-AS) hop isn't a reflector client and the packet now takes a different path than the reflector client thought it would take.)
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