Date: Tue, 30 Aug 2011 09:05:11 +0200 From: Andre Oppermann <andre@freebsd.org> To: ivo.vachkov@gmail.com Cc: freebsd-net@freebsd.org, sthaug@nethelp.no Subject: Re: Request for information/comment on default-free zone router properties Message-ID: <4E5C8BA7.3080501@freebsd.org> In-Reply-To: <20110829.155904.08325665.sthaug@nethelp.no> References: <CADrMwxfMSF5LsAm3MzPMufN=z_Rx5Mj3Wt2uJNGmD4aFXQECDA@mail.gmail.com> <20110829.155904.08325665.sthaug@nethelp.no>
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On 29.08.2011 15:59, sthaug@nethelp.no wrote: >> Is there any (no need to be official) information what is the number >> of different routes (for IPv4 and IPv6) on a default-free zone (DFZ) >> router in the Internet? I vaguely remember the number 450 000+ >> distinct routes for IPv4? But what about IPv6? > > See http://www.cidr-report.org - it has all the information you need. > > Extract from the weekly post to Nanog: > > Recent Table History > Date Prefixes CIDR Agg > 19-08-11 371450 219002 > 20-08-11 371427 219147 > 21-08-11 371547 219346 > 22-08-11 371326 218957 > 23-08-11 371090 219346 > 24-08-11 371769 219465 > 25-08-11 372189 219508 > 26-08-11 372363 219490 For IPv6 the current number of prefixes is about 12451. Both IPv4 and IPv6 numbers are expected to rise significantly in the future as more people migrate to IPv6, and the exhausted IPv4 pool gets fragmented more and more. >> On a related note, what is the number of the network interfaces on a >> DFZ router? No need for exact number, educated guess/estimation would >> be greatly appreciated too. > > How long is a piece of string? "It depends." And the same is the case > for number of interfaces. You obviously need a minimum of three for a > router to do anything "interesting" with the packets. Also, it depends > on whether you're talking about physical interfaces or logical (sub) > interfaces. I'd say anything from 3 to 20 is fairly typical. I'd say that range is about right for pure core/backbone routers. What happens more and more is that access concentrators (xDSL) run BGP as well. In that case the number of interfaces is 10k and more. Only a few of them 'run' BGP though. -- Andre
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