On Nov 20, 2021, at 00:41 , Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp> wrote:
Speed of router depends on degree of parallelism.
So, for quick routing table lookup, if you provide 128bit TCAM for IPv6 in addition to 32bit TCAM for IPv4, speed is mostly same, though, for each entry, TCAM for IPv6 costs 4 times more and consumes 4 times more power than that for IPv4.
However, as global routing table size of IPv6 is a lot smaller than that of IPv4, the number of the entries of TCAM for IPv6 is a lot smaller than that for IPv4. But it is so primarily because IPv6 is not very widely deployed.
Uh, no. It is so because on average IPv4 is so fragmented that most providers of any size are advertising 8+ prefixes compared to a more realistic IPv6 average of 1-3. Owen