20 Nov
2021
20 Nov
'21
3:41 a.m.
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. Or, if you perform IPv6 address look up by software, IPv6 is slower. Masataka Ohta