> On 4 Nov 2015, at 16:23, Paul Thornton <[email protected]> wrote: > > However, it *does* hurt you if I send you one of your own prefixes, or a more > specific of one of your own prefixes. This is the golden rule of "In > general, don't accept any part of your own space from a peer or transit > provider" to avoid you having interesting internal routing problems.
Yes! And you should also extend this protection to prefixes covering next-hops for routes in your IGP. This could include things like IXP peering-lan subnets (which in general should never be seen in BGP these days), and the transfer nets facing your transit providers (although for many people these would be caught in a general filter not accepting < /24) A more specific of some of these slipping into your network could cause big problems. Will
