Support for 4B ASN in BGP

[Ondrej Zajicek]

On Mon, Oct 06, 2008 at 03:10:16PM +0200, Martin Mares wrote:
> Hello!
> 
> > It is not converted - if BIRD is 4B-aware, then it is used (together
> > with 2B AS_PATH) to reconstruct real AS_PATH and then immediately
> > discarded. if BIRD is not 4B-aware, then BIRD should handle
> > it as unknown optional transitive atribute.
> 
> This however does not work with per-instance 4B-awareness.

Per-instance 4B-awareness might be implemented easily by just
not advertising that capability (and ignoring such advertisement
from that neighbor). That would force 2B-based communication
with neighbor, but otherwise we can process it like 4B-aware
BGP speaker (reconstruct 4B path from AS_PATH and AS4_PATH
and use 4B path as internal representation).

-- 
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."
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 197 bytes
Desc: Digital signature
URL: <http://trubka.network.cz/pipermail/bird-users/attachments/20081006/4e376bf0/attachment-0001.asc>