> > Between peering routers on a dual-stacked network, is it considered best > practices to have two BGP sessions (one for v4 and one for v6) between them? > Or is it better to put v4 in the v6 session or v6 in the v4 session? > > According to docs, obviously all of these are supported and if both sides are > dual stacked, even the next-hops don't need to be overwritten. > > Is there any community-approach to best practices here? Any FIB weirdness > (e.g. IPv4 routes suddenly start sucking up IPv6 TCAM space, etc) that > results with one solution over the other? > > Thanks in advance, > > DJ
For what it’s worth, my AboveNet and Cogent BGP peerings are v4 for v4 routes and v6 for v6 routes. Two separate sessions to each carrier. While I don’t have any BGP speaking IPv6 customers yet, I would set up this same way to keep the two protocols apart from each other. Best, Ryan Wilkins
