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Date: Tue, 26 Apr 2011 12:34:05 -0400 (EDT) From: "Justin M. Streiner" <streiner@cluebyfour.org> To: nanog@nanog.org In-Reply-To: <3e67f6c1$2b23cd7f$74e5177b$@com> Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org 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
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