is ipv6 fast, was silly Redeploying

Masataka Ohta mohta at necom830.hpcl.titech.ac.jp
Sat Nov 20 08:41:23 UTC 2021


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


More information about the NANOG mailing list