[157238] in North American Network Operators' Group
Re: Is a /48 still the smallest thing you can route independently?
daemon@ATHENA.MIT.EDU (William Herrin)
Thu Oct 11 17:36:39 2012
In-Reply-To: <4FEF985E-0131-49BE-8407-76D04217A8BF@netconsonance.com>
From: William Herrin <bill@herrin.us>
Date: Thu, 11 Oct 2012 17:33:42 -0400
To: Jo Rhett <jrhett@netconsonance.com>
Cc: NANOG mailing list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Thu, Oct 11, 2012 at 5:02 PM, Jo Rhett <jrhett@netconsonance.com> wrote:
> I've finally convinced $DAYJOB to deploy IPv6. Justification for
> the IP space is easy, however the truth is that a /64 is more
> than we need in all locations. However the last I heard was that
> you can't effectively announce anything smaller than a /48.
> Is this still true?
Hi Jo,
The short answer to your question is:
/48 is the longest prefix from a direct RIR assignment that everyone
currently accepts via BGP.
/32 is the longest prefix from an ISP allocation that everyone
currently accepts via BGP.
As with IPv4 /24's, some folks accept longer prefixes. Not everyone.
> Is this likely to change in the immediate future, or do I need to ask for a /44?
You need to ask for a /44.
Regards,
Bill Herrin
--
William D. Herrin ................ herrin@dirtside.com bill@herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
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