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.
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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