On 28/07/2011 19:33, Lee Starnes wrote: > Does anyone have any recommended reading for doing IPv6 BGP peering on > IOS-XR? We setup our peer with Cogent and can get full routes in, but can't > seem to figure out how to announce our /32. I had assumed it setup just the > same way as IPv4, but can't seem to get it to announce out. I did some > searching on Cisco's site, but didn't really find anything that pertained to > how/what to announce and what not to announce.
bgp in xr is different from vanilla ios in that by default, it applies an implicit deny on outbound prefixes. Regular IOS applies an implicit permit, which leads to prefix leakages. XR definitely takes a more sensible approach here. What you need to do is to set up a route-policy for your neighbour, and hook that route policy to whatever mechanism you want for prefix redistribution. Let's say in this example you want to hook it into a static prefix list: prefix-set my-ipv6-prefixes 2001:db8:1234::/48 end-set route-policy my-ipv6-policy if destination in my-ipv6-prefixes then pass else drop endif end-policy router bgp 65432 neighbor 2001:db8:ffff::1 address-family ipv6 unicast route-policy my-ipv6-policy out [...] Obviously, you can hook the route-policy into any filtering mechanism you want. I am a total fan of XR's RPL. It makes regular IOS route-maps look lame-ass in comparison. Nick _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
