[193422] in North American Network Operators' Group
Re: IPv6 BGP prefix filters
daemon@ATHENA.MIT.EDU (Job Snijders)
Mon Jan 16 18:36:44 2017
X-Original-To: nanog@nanog.org
Date: Mon, 16 Jan 2017 23:17:26 +0100
From: Job Snijders <job@instituut.net>
To: Alistair Mackenzie <magicsata@gmail.com>
In-Reply-To: <CA+bbMku0CvzTD+dhzipm-kmfLD7np_oAtSb8e1kGnBcZf7G15w@mail.gmail.com>
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Mon, Jan 16, 2017 at 10:01:00PM +0000, Alistair Mackenzie wrote:
> So recently I've come across an issue with a large ISP announcing a
> /22 and /25 of IPv6 space. We are currently filtering <28 and >48
> which until now has worked fine for us.
>
> What are others using as their prefix filters in the DFZ?
The NTT global backbone (AS 2914) generally accepts (barring the other
filters) IPv6 prefixes within "2000::/3 ge 12 le 48" over eBGP. Longer
prefixes are only accepted on customer sessions, when a valid IRR route6
object exists.
Kind regards,
Job
