[ntp:questions] NTP over IPv6 with Teredo

Ronan Flood usenet at umbral.org.uk
Thu Feb 14 15:06:10 UTC 2008


At my workplace we're slipping in IPv6 on our NTP servers, and I've
been watching the traffic and checking out the clients which pop up,
to see if they hit any problems when unintentionally using IPv6
instead of IPv4.

Native-IPv6 and 6to4-tunnel clients seem OK, but I've found one client
using a Teredo tunnel (RFC 4380), and it looks like that is something
to be avoided:

     remote       refid  st t when poll reach   delay   offset  jitter
---------------------------------------------------------------------
+2001:630:1:101: .GPS.    1 u  621 1024  177  350.111  115.061   2.000
-2001:630:1:102: .MSF.    1 u  617 1024  177  355.528  114.905   0.734
-2001:630:1:103: .PPS.    1 u  631 1024  177  575.602  222.278   0.056
+195.66.241.3    .PPS.    1 u  524 1024  377   22.724  -15.799   0.788
*195.66.241.10   .IRIG.   1 u  753 1024  377   27.490  -15.864   0.775
 127.127.1.0     .LOCL.  13 l   28   64  377    0.000    0.000   0.002

Being a UK client, using a Teredo server on the west coast of the US
probably doesn't help, but it could also be inherent latency in Teredo.

"server -4" would be wise here :-/


-- 
Ronan Flood <usenet at umbral.org.uk>




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