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From: "Patrick W. Gilmore" <patrick@ianai.net> In-Reply-To: <4B4120B1642DCF48ACA84E4F82C8E1F65B83E20FC4@EXCH> Date: Tue, 26 Apr 2011 12:44:24 -0400 To: NANOG list <nanog@nanog.org> Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org On Apr 26, 2011, at 12:39 PM, Kate Gerry wrote: > Funny enough, some carriers actually require the 'smallest' as being = /32... :( Vote with your wallet. Some carriers would prefer if only transit free networks were allowed to = originate routes. Doesn't mean you should follow their lead. --=20 TTFN, patrick > -----Original Message----- > From: Justin M. Streiner [mailto:streiner@cluebyfour.org]=20 > Sent: Tuesday, April 26, 2011 9:34 AM > To: nanog@nanog.org > Subject: Re: IPv6 Prefix announcing >=20 > On Tue, 26 Apr 2011, Nick Olsen wrote: >=20 >> I've always been under the impression its best practice to only=20 >> 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? >=20 > You're likely to get different answers to this, but the 'magic number'=20= > 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. >=20 > jms >=20 >=20
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