nanog mailing list archives
Re: Is a /48 still the smallest thing you can route independently?
From: William Herrin <bill () herrin us>
Date: Thu, 11 Oct 2012 17:33:42 -0400
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/> Falls Church, VA 22042-3004
Current thread:
- Is a /48 still the smallest thing you can route independently? Jo Rhett (Oct 11)
- Re: Is a /48 still the smallest thing you can route independently? Jeroen Massar (Oct 11)
- Re: Is a /48 still the smallest thing you can route independently? Jo Rhett (Oct 11)
- Re: Is a /48 still the smallest thing you can route independently? Owen DeLong (Oct 11)
- Re: Is a /48 still the smallest thing you can route independently? William Herrin (Oct 11)
- Re: Is a /48 still the smallest thing you can route independently? bmanning (Oct 11)
- Re: Is a /48 still the smallest thing you can route independently? Randy Bush (Oct 13)
- Re: Is a /48 still the smallest thing you can route independently? Måns Nilsson (Oct 13)
- Re: Is a /48 still the smallest thing you can route independently? Edward Dore (Oct 14)
- <Possible follow-ups>
- Re: Is a /48 still the smallest thing you can route independently? Scott Weeks (Oct 11)
- Re: Is a /48 still the smallest thing you can route independently? Randy Carpenter (Oct 11)
- Re: Is a /48 still the smallest thing you can route independently? Jo Rhett (Oct 11)
- Re: Is a /48 still the smallest thing you can route independently? Randy Carpenter (Oct 11)
- Re: Is a /48 still the smallest thing you can route independently? Justin M. Streiner (Oct 11)
- Re: Is a /48 still the smallest thing you can route independently? William Herrin (Oct 11)
- Re: Is a /48 still the smallest thing you can route independently? Randy Carpenter (Oct 11)
- Re: Is a /48 still the smallest thing you can route independently? Jeroen Massar (Oct 11)