Rob Janssen wrote:
I've found a list at http://eng.hexago.com/services/ntp.shtml. All
except time.ncore.pl seem to work.
Do you get good latency on ipv6 servers? I get the impression that a
lot of ipv6 routing is going via encapsulation tunnels and so it is
probably less optimal than ipv4.
ntp1(.ipv6).lrz-muenchen.de: IPv6: 31.9ms - IPv4: 29.8ms
ntp1.teleport-iabg.de: IPv6: 10.4ms - IPv4: 8.44ms
This is not due to a tunnel along all the way (which would give the
exact same latency). I tunnel from my home machine to the tunnel box of
my access provider (demuc02.sixxs.net), starting there it is routed all
the way.
In general latencies don't have to be worse than IPv4, there are enough
providers running IPv6 native on the same links, giving exactly the same
latency. You have the latency from your box to the tunnel server (<11ms
in my case (8ms IPv4), can be worse of course), if your tunnel provider
has a routing policy that sucks asteroids through straws (HE.net for
example) you will have an extremely bad latency to most destination, and
methods like 6to4 and Teredo can be very good and quite bad depending on
the relay being selected (by the server).
Summary: There are large parts of the IPv6 cloud where latencies are
comparable to IPv4 (and sometimes even better), but there are more
offers with crappy latencies than in IPv4 (mostly because it is free and
not used by gamers yet).
This of course makes it pretty hard for the pool guys to get a decent
metric of servers to include in the pool, as you most probably have to
have a distributed weighted monitoring to work around partial crappy
connectivity. If needed I could offer at least three monitoring boxes in
three completely different networks (run by different people, having
different upstreams etc).
Regards,
Bernhard
--
Bernhard Schmidt Netzplanung / IPv6
Leibniz-Rechenzentrum der Bayerischen Akademie der Wissenschaften
Boltzmannstr. 1 D-85748 Garching bei Muenchen
Tel: +49 89 35831-7885 [EMAIL PROTECTED]
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