On 28-Jun-2007, at 19:54, Jonny Martin wrote:
Team Cymru provide a bogon BGP feed which make keeping up with bogon changes a cinch. 1 - Peer with the Cmyru bogon route server. 2 - Profit!
Taking a BGP feed of bogons is good if you are trying to avoid packets with bogon destinations following a default out towards a transit provider. They're no good for filtering long prefix bogons announced to you by peers, though, and if you accept those then traffic with bogon destinations can follow them regardless of any cymru-fed covering routes with null next-hops. If these statements are woefully out-of-date, where have I been, get with the programme, etc then someone should spell out precisely what fancy modern router policy knobs they are turning to get the desired result. While you're doing that I'll just nod wisely and mutter things about "yeah, I was just pretending not to know that stuff, because I was making a point. Yeah, that's it. You're all so lucky I'm here." And things of that nature. Joe