mailing list archives
RE: IPv6 Prefix announcing
From: Kate Gerry <kate () quadranet com>
Date: Tue, 26 Apr 2011 09:39:02 -0700
Funny enough, some carriers actually require the 'smallest' as being /32... :(
From: Justin M. Streiner [mailto:streiner () cluebyfour org]
Sent: Tuesday, April 26, 2011 9:34 AM
To: nanog () nanog org
Subject: Re: IPv6 Prefix announcing
On Tue, 26 Apr 2011, Nick Olsen wrote:
I've always been under the impression its best practice to only
announce prefixes of a /24 and above when it comes to IPv4 and BGP.
I was wondering if something similar had been agreed upon regarding IPv6.
And if That's the case, What's the magic number? /32? /48? /64?
You're likely to get different answers to this, but the 'magic number'
appears to be /48. Looking in the v6 BGP table, you will likely find smaller prefixes than that, but a number of the
major carriers seem to be settling on /48 as the smallest prefix they will accept. /48 is also the smallest block most
of the RIRs will assign to end-users.