[Xorp-hackers] XORP BGP 4-byte AS number support

[Mark Handley]

Well, the RFC says:

   To simplify transition, this document assumes that an Autonomous
   System could start using a 4-octet AS number only after all the BGP
   speakers within that Autonomous System have been upgraded to support
   4-octet AS numbers.

I'm really unclear on what happens if you enable it on a few routers
and its not supported on others within an AS.  The RFC isn't really
clear on the issue in the case where your AS is two-octet compatible.
In the case when your AS number is not two-octet compatible obviously
it should default to on (currently it doesn't; this is a bug).
Anyway I set it to be an explicit decision to turn it on rather than
force anyone who upgrades to test out untested corner cases.

 - Mark

On Dec 29, 2007 10:41 AM, Kristian Larsson <kristian at spritelink.net> wrote:
> Why is this an option? Is there a reason not to
> have it turned on by default (ie always have
> support) ?
>
>   -K
>
> --
> Kristian Larsson                                        KLL-RIPE
> Network Engineer & Peering Coordinator      SpriteLink [AS39525]
> +46 704 910401                                kll at spritelink.net
>