On Tue, Aug 30, 2011 at 10:05 AM, Andre Oppermann <an...@freebsd.org> wrote:
> On 29.08.2011 15:59, sth...@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. Yes, I believe the real challenge for effective routing will be the wide adoption of IPv6. Even with prefixlen /32 the possible number of IPv6 routeable prefixes is greater than the number of routable IPv4 addresses now. > > 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. My interest is purely academic. I would like to experiment with different data structures to see if there is a way to increase routing performance with large number of routes and interfaces. > -- > Andre > -- Ivo Vachkov _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
