Thanks everyone for insightful answers! On Fri, Jul 18, 2014 at 6:09 AM, Mark Tinka <mark.tinka@seacom.mu> wrote:
On Monday, July 14, 2014 07:32:43 PM Jeff Tantsura wrote:
Mark,
BGP to RIB filtering (in any vendor implementation) is targeting RR which is not in the forwarding path, so there¹s no forwarding towards any destination filtered out from RIB. Using it selectively on a forwarding node is error prone and in case of incorrect configuration would result in blackholing.
As with every feature on a router, you need to know what you're doing to make it work.
Don't blame the cows if you turn on knobs you have no business using, or don't care to learn the risks of.
We use this feature in our network successfully, because we know what we're doing, and care to understand the risks.
If I use it in a manner other than previously directed (while I know it's a use-case, I've never heard of any vendor saying it ONLY targeted out-of-path route reflectors, but then again, I don't generally walk vendor corridors for the scoop), well, welcome to the Internet; where core routers can either be behemoths that move air the size of a football field and could be mistaken for seismic detection machines, or last generation's x86 home desktop running Quagga and grandma's health app :-).
Mark.
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