Hi, Dan-- On Jun 28, 2016, at 8:52 PM, Dan Geist <[email protected]> wrote: > Chuck, I don't disagree that overall experience may be better for people with > networks that don't have robust IPv6 capability, but there's nothing magical > about v4 (or v6 either) that makes it "perform better" at layer 3.
If you'd like to consider things at layer 3, note that IPv4 normally has a 20-byte header size, and IPv6 has a 40-byte header. For large packets, the difference in protocol overhead is not very significant-- about 1%-- but for a 56-byte NTPv4 packet, using IPv6 means sending about 125% as many bits over the wire as sending the same payload via IPv4. If other factors are held equal, IPv4 is always going to perform better than IPv6 for NTP because smaller packets mean shorter transmit/receive times and thus reduced latency for NTP polls. (There's nothing magical about protocol overhead, except perhaps pretending that there isn't a difference. :-) Regards, -- -Chuck _______________________________________________ pool mailing list [email protected] http://lists.ntp.org/listinfo/pool
