[ixpmanager] Route Server Install Bird 2

[Barry O'Donovan]

Sam Malyon wrote on 13/04/2020 05:22:
> So I eventually worked out the Issue, IXP Manager/bird2 wont allow me
> to use a 32 bit ASN.
> 
> Do I need to get a new 16bit ASN or will the 32bit ASN be able to
> work?

If you read the documentation here:

https://docs.ixpmanager.org/features/route-servers/#setting-up

we advise:

> You are strongly advised to use / request a 16-bit ASN from your RIR
> for route server use. If you do not, you will be unable to offer your
> members standard community based filtering.

I'm not sure we have ever sanitisied the Bird configuration for 32-bit 
ASNs but we really really would advise a 16-bit ASN for route servers 
still as many people are still running older (stable) versions of 
routing software that do not support RFC 8195:

http://largebgpcommunities.net/implementations/

  - Barry