Scalability issues in the Internet routing system

Mon Oct 24 15:26:03 UTC 2005

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