[ntp:hackers] IPv6 servers I can test against?

Terje Mathisen terje at tmsw.no
Fri Dec 17 09:31:36 UTC 2010


John Hay wrote:
> On Fri, Dec 17, 2010 at 10:01:52AM +0100, Terje Mathisen wrote:
>> I have been working with ipv6 for a week now, intending to setup a
>> public stratum-1 server which can go into the pool.
>>
>> Since I have a NAT'ing fiber router with dynamic IP I have used dyndns
>> to make it available up to now (tmsw.dyndns.org), but I want to have a
>> static ipv6 address as well.
>>
>> Currently I have a working sixxs.net tunnel so I would like to know of a
>> few ipv6 ntp servers I can point my box at!
>
> It might be a bit far, but you can use {tick|tock}.meraka.csir.co.za.
> It is native ipv6 right out of the country.

This is _absolutely_ amazing!

The ipv6 route between Norway and South Africa is _perfectly_ 
symmetrical, so even though the ping time is 256 ms those two servers 
work almost as well as my local GPS (I am testing this from the linux 
box which hosts the tunnel):

root at terje-ipv6:/etc# ntpq -pn
      remote           refid      st t when poll reach   delay   offset 
  jitter
==============================================================================
-91.189.94.4     193.79.237.14    2 u   32   64  377   32.585   -1.396 
  0.119
*192.168.93.123  .GRMN.           1 u    6   16  377    0.319   -0.009 
  0.007
-81.167.109.120  192.36.133.25    2 u   31   64  377    7.739    5.293 
  0.068
-194.63.250.121  192.36.144.22    2 u   29   64  377    2.141    0.136 
  0.054
-81.166.171.168  131.130.251.107  2 u   33   64  377    7.950    3.819 
  0.044
+2001:4200:7000: .GPS.            1 u   27   64  377  256.764   -0.010 
  0.086
+2001:4200:7000: .PPS.            1 u   24   64  377  256.178    0.135 
  0.113

Notice that the two .za servers are preferred in front of all three of 
the no.pool.org servers!

(Harlan, thank you as well, I'll try the server in Denmark.)

Terje
-- 
- <Terje at tmsw.no>
"almost all programming can be viewed as an exercise in caching"


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