Funny enough, some carriers actually require the 'smallest' as being /32... :(
-----Original Message----- From: Justin M. Streiner [mailto:strei...@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. jms
