[ntp:questions] Does an IPV6 address work with NTPD?

Harlan Stenn stenn at ntp.org
Thu Nov 27 22:19:58 UTC 2014


"Charles Elliott" writes:
> The U.S. Government (NIST) has a new time server (time-d.nist.gov) 
> whose address is 2610:20:6F15:15::27.  When I put that address into 
> ntp.conf the Meinberg Time Server Monitor indicates "Unknown clock 
> type" in the Type column and Reach remains 000.  However, when 
> 2610:20:6F15:15::27 is pinged the return is "General failure".   
> 
> (Dr.) Judah Levine, Time and Frequency Division, NIST Boulder, says 
> 2610:20:6F15:15::27 works as far as he can tell.  So, do IPV6 addresses 
> result in anything useful when used in NTPD?

Works for me:

stenn at psp-fb1> sntp 2610:20:6F15:15::27
27 Nov 22:14:24 sntp[23486]: Started sntp
2014-11-27 22:14:24.982440 (+0000) +0.00180 +/- 0.010162 secs
stenn at psp-fb1>

and we use IPv6 in general:

stenn at psp-fb1> ntpq -p psp2
     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
 ff05::101       .ACST.          16 u    -   64    0    0.000    0.000
0.001
*149.20.68.1     216.218.254.202  2 u 1010 1024  377    0.151   -0.698
0.500
 lists.ntp.org   149.20.68.1      3 u  117 1024  377    0.226   -0.593
0.591
 mail1.ntp.org   149.20.68.1      3 u  657 1024  377    0.339   -0.431
0.516
 2001:4f8:fff7:1 149.20.68.1      3 u  373 1024  377    0.341   -0.574
0.586
 ns1.ntp.org     149.20.68.1      3 u  382 1024  377    0.321   -0.425
0.476
 psp3.ntp.org    149.20.68.1      3 u  897 1024  377    0.363   -0.401
0.532
 fe80::225:90ff: 149.20.68.1      3 u   98 1024  377    5.061   -2.941
0.389
 2001:4f8:fff7:1 149.20.68.1      3 u  266 1024  377    0.174   -0.478
0.132
stenn at psp-fb1>

H


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