as_path question

Ondrej Zajicek santiago at crfreenet.org
Tue Jul 5 15:21:22 CEST 2011


On Tue, Jul 05, 2011 at 01:07:39PM +0100, Matthew Walster wrote:
> 2011/7/5 Mikhail A. Grishin <magr at ripn.net>:
> > What purpose of  '{' and '}' at BGP.as_path output?
> 
> It indicates an "AS Set" - some aggregation happened, the longer
> routes of which were in the two ASNs in the brackets.

Yes

> > Why at 'show route' we see only '[i]'? (expected to see the first AS in
> > as_path)
> 
> IMO, it should show AS48467 as they were the aggregator.

If there is no definite originator (because of aggregation), nothing is shown.

-- 
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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