IPv6 vs IPv4 Latency Comparison using IPv6 Reverse DNS Nameservers

By Mike Leber

Latency comparisons between IPv6 and IPv4 for nameservers providing reverse DNS for IPv6 prefixes found in the global IPv6 routing table.
As of 2007-09-24. This is the static dataset that was used for the paper at http://bgp.he.net/going-native.pdf
Please send questions, comments, or bugs to mleber@he.net

Tests run from a single server on Hurricane Electric's IPv4 and IPv6 backbone in Fremont, California.

The latest results of the current version of these tools can be found at http://bgp.he.net/ipv6-progress-report.cgi

Total IPv6 Prefixes
843

Total IPv6 rDNS Nameservers in DB
969

IPv6 rDNS Nameservers with an IPv4 address
951

IPv6 rDNS Nameservers with an IPv6 address
361

IPv6 rDNS Nameservers reachable via IPv4 (ping or dns)
810

IPv6 rDNS Nameservers reachable via IPv6 (ping or dns)
284

IPv6 rDNS Nameservers reachable via both IPv4 and IPv6
256

IPv6 rDNS Nameservers where IPv6 is faster than IPv4 (by more than 1ms)
63

IPv6 rDNS Nameservers where IPv4 and IPv6 are the same speed (within 1ms)
56

IPv6 rDNS Nameservers where IPv4 is faster than IPv6 (by more than 1ms)
137

Networks listed with a higher IPv6 than IPv4 latency should consider fixing it by natively IPv6 peering with Hurricane at any one of 18 different exchange points in the US and Europe.
http://he.net/adm/peering.html