Re: Scalability issues in the Internet routing system

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