[149245] in North American Network Operators' Group
Re: Hijacked Network Ranges
daemon@ATHENA.MIT.EDU (Jonathan Lassoff)
Tue Jan 31 13:27:48 2012
In-Reply-To: <CAPiURgW5Yj1JK91yC9DQp7XkzrwZmAL8S76GWDE8nW85mCrDmA@mail.gmail.com>
Date: Tue, 31 Jan 2012 10:27:28 -0800
From: Jonathan Lassoff <jof@thejof.com>
To: Grant Ridder <shortdudey123@gmail.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Tue, Jan 31, 2012 at 10:19 AM, Grant Ridder <shortdudey123@gmail.com> wrote:
> Hi,
>
> What is keeping you from advertising a more specific route (i.e /25's)?
Most large transits and NSPs filter out prefixes more specific than a /24.
Conventionally, at least in my experience, /24's are the most-specific
prefix you can use and expect that it will end up in most places.
Some shops with limited router processing or table storage capacity
will filter even more restrictively, so a bigger aggregate is worth
announcing as well.
Cheers,
jof
