[101365] in North American Network Operators' Group
Re: v6 subnet size for DSL & leased line customers
daemon@ATHENA.MIT.EDU (Joe Abley)
Wed Jan 2 13:06:39 2008
Cc: Christopher Morrow <morrowc.lists@gmail.com>,
"NANOG list" <nanog@nanog.org>
From: Joe Abley <jabley@ca.afilias.info>
To: Iljitsch van Beijnum <iljitsch@muada.com>
In-Reply-To: <AC44E3CC-B843-45DE-AB14-EEAA1C52954E@muada.com>
Date: Wed, 2 Jan 2008 13:05:41 -0500
Errors-To: owner-nanog@merit.edu
On 2-Jan-2008, at 10:21, Iljitsch van Beijnum wrote:
> On 2 jan 2008, at 6:42, Christopher Morrow wrote:
>
>> out of curiousity how is this sort of thing supposed to be done in
>> v6?
>> (traffic engineering given the '1 prefix per ISP' standard mantra)
>
> AS path prepending, local preference, that kind of thing...
Common practice with IPv4 seems to suggest that those knobs aren't
sufficient in real life; people still find it necessary to carve up
their aggregates and announce more-specifics in strategic directions.
I would suggest that not *all* observed instances of such
deaggregation are due to operator ignorance :-)
I imagine that the same practice will continue (is continuing?) with
IPv6, to the extent that peoples' bogon filters allow it to have any
practical effect.
Joe
