Re: Best practices IPv4/IPv6 BGP (dual stack)

[Laszlo Hanyecz <laszlo () heliacal net>]

Two different sessions using two different transport protocols.  The v4 BGP session should have address family v6 
disabled and vice versa.  Exchange v4 routes over a v4 TCP connection, exchange v6 routes over a v6 TCP connection.  
Just treat them as independent protocols. 

-Laszlo


On May 2, 2014, at 7:44 PM, Deepak Jain <deepak () ai net> wrote:

> 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