> > Pruning FIB entries, on the other hand, can be done quite safely as > long as you're willing to accept the conversion of "null route" to > "don't care." Some experiments were done on this in the IETF a couple > years back. Draft-zhang-fibaggregation maybe? Savings of 30% in > typical backbone nodes looked possible. That's 30% of your TCAM > reclaimable. >
Hence the “when programming the TCAM” part of my original statement :) > For the moment it seems to be cheaper to just build bigger TCAMs. > Cheaper for the router vendors anyway. > I think of it more like “why spend development dollars on a feature that will cause my customers to keep their existing hardware longer and delay upgrades?” Yes, vendors do think like that. -C > Regards, > Bill Herrin > > > > -- > William Herrin ................ her...@dirtside.com b...@herrin.us > Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/> > Can I solve your unusual networking challenges?
