[99351] in North American Network Operators' Group
Re: Standard prefix length filtering
daemon@ATHENA.MIT.EDU (Andy Davidson)
Wed Sep 19 04:06:34 2007
In-Reply-To: <69901.55305.qm@web44904.mail.sp1.yahoo.com>
Cc: nanog@merit.edu
From: Andy Davidson <andy@nosignal.org>
Date: Wed, 19 Sep 2007 09:03:35 +0100
To: chk 543 <chk543_mail@yahoo.com>
Errors-To: owner-nanog@merit.edu
On 19 Sep 2007, at 06:22, chk 543 wrote:
> Is there a standard prefix length most providers filter on, or is
> there a way to find out what each provider filters on? We have been
> assigned a /22 and are wondering if we will have any issues with
> this block.
There are no hard and fast rules, but a general rule is the more you
de-aggregate the more problems you are going to have, so unless you
have a very good reason not to, announce the /22 and nothing longer.
Best wishes,
Andy Davidson.
