as_path question

[Ondrej Zajicek]

On Tue, Jul 05, 2011 at 04:21:51PM +0400, Mikhail A. Grishin wrote:
> Moreover, this prefix (94.228.160.0/20) was filtered and not accepted  
> because of this BIRD structure:
> # Apply as_path filters on the last AS (originated route)
>   allas = [ 15905, 34211, 41206, 44116, 44893, 47773, 48467, 50875,  
> 51031, 51186, 51443, 52163 ];
>   if ! (bgp_path.last ~ allas) then reject;
>
> So bgp_path.last doesn't hit to 48467 in this case.
> Is this normal?

Yes, as bgp_path.last expression returns one integer, it cannot return
both (or more) ASNs in the AS set. It returns 0 in that case.

-- 
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."
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