[86175] in North American Network Operators' Group
Re: Scalability issues in the Internet routing system
daemon@ATHENA.MIT.EDU (Tony Li)
Mon Oct 24 20:29:39 2005
In-Reply-To: <048701c5d864$da585b40$6401a8c0@alexh>
Cc: <nanog@nanog.org>, "Daniel Senie" <dts@senie.com>
From: Tony Li <tony.li@tony.li>
Date: Mon, 24 Oct 2005 08:26:03 -0700
To: Alexei Roudnev <alex@relcom.net>
Errors-To: owner-nanog@merit.edu
On Oct 23, 2005, at 11:33 PM, Alexei Roudnev wrote:
>
> One question - which percent of routing table of any particular
> router is
> REALLY used, say, during 1 week?
>
> I have a strong impression, that answer wil not be more than 20%
> even in
> biggerst backbones, and
> will be (more likely) below 1% in the rest of the world. Which
> makes a hige
> space for optimization.
As of the last time that I looked at it (admittedly quite awhile
ago), something like 80% of the forwarding table had at least one hit
per minute. This may well have changed given the number of traffic
engineering prefixes that are circulating.
Tony
