Defines for mixed IPv6/IPv4

[Jeroen Massar]

> On 23 Jan 2024, at 14:13, Nico Schottelius via Bird-users <bird-users at network.cz> wrote:
> 
> 
> Hello bird users,
> 
> I am wondering how you handle matching both IPv6 and IPv4 prefixes
> efficiently.
> 
> We have tons of blocks in our config like these:

Generate the configs.

Especially when doing IRR filtering, one simply lets bgpq4 generate the filters
and then drop those definitions into a bird include file, and generate the peers parts too.

For variations/options, generate those options too based on the input ASN/peer.

Use your favourite configuration management tool or use something like:

https://github.com/coloclue/kees

That does all of it already (bgp4 and uses peeringdb for peers), YMMV for
what tool to use (eg. I got my own little thingy for it).

Greets,
 Jeroen