IPv4 vs IPv6 on old Cisco

Following our recent BGPv4 peering on Renater (french network for research and universities), and our demand on IPv6, i have done a little performance benchmark. I would share you the results.

Globally, BSD IPv4 & IPv6 performances are equivalent, even passing by OpenBSD routers (soft routing). However, CISCO device (45xx chassis, year 2006) which do soft routing has very bad routing performances (2.3Mo/sec whereas 48Mo/sec in IPv4).