BGP session local capabilities / announced AF

[Ondrej Zajicek]

On Wed, Jul 20, 2022 at 09:01:42AM -0400, Robert Blayzor wrote:
> Bird 2.0.10
> 
> 
> I have BGP neighbors I only want to advertise ipv4 or ipv6 to, not both. It
> appears BIRD assumes both even though I only have either a ipv4 or ipv6
> channel configured for the protocol. (not both)   Is v4 implicit? If so, is
> there a way to negate that?
> 
> 
>     Local capabilities
>       Multiprotocol
>         AF announced: ipv4 ipv6

Hello

IPv4 is not implicit, it should advertise capabilities based on defined
channels. What is your config file? It works for me (two protocols, one
with ipv4 channel, the other with ipv6 channel):

  show protocols all ebgp4
  ...
    Local capabilities
      Multiprotocol
        AF announced: ipv4

  show protocols all ebgp6
  ...
    Local capabilities
      Multiprotocol
        AF announced: ipv6

-- 
Elen sila lumenn' omentielvo

Ondrej 'Santiago' Zajicek (email: santiago at crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."