[195095] in North American Network Operators' Group
Re: Long AS Path
daemon@ATHENA.MIT.EDU (sthaug@nethelp.no)
Wed Jun 21 08:44:47 2017
X-Original-To: nanog@nanog.org
Date: Wed, 21 Jun 2017 14:42:13 +0200 (CEST)
To: list@satchell.net
From: sthaug@nethelp.no
In-Reply-To: <b1e51368-9e3a-fe2a-6709-8c6a59a5651f@satchell.net>
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
> > I see no valid reason for such long AS paths. Time to update filters
> > here. I'm tempted to set the cutoff at 30 - can anybody see a good
> > reason to permit longer AS paths?
>
> Well, as I mentioned in my Net Neutrality filing to the FCC, a TTL of 30
> is OK for intra-planet routing, but when you start leaving the big blue
> marble you will need to allow the packets to live longer.
TTL != AS path length
I can certainly see the use for a TTL of 30. I cannot see the use for
an AS path length greater than 30 (especially not when 2 ASes are each
repeated 16 times).
Steinar Haug, Nethelp consulting, sthaug@nethelp.no
