[ntp:questions] IPv6 link local

Brandon Applegate brandon at burn.net
Fri Dec 18 17:29:52 UTC 2015


> On Dec 18, 2015, at 12:57 AM, Harlan Stenn <stenn at ntp.org> wrote:
> 
> Brandon Applegate writes:
>> [vom at freenas ~]$ ntpq -c version
>> ntpq 4.2.4p5-a (1)
> 
> That's pretty ancient.  Any chance you could try something current?
> 
> That would also get you the -w option to ntpq.

Booted a machine running Ubuntu 14.04 - so certainly newer ntp (newer than FreeNAS at least) from their repos (but perhaps not as recent as you really need for a proper test).

Defining a server in ntp.conf with link local does NOT work.  Interestingly - ntpdate DOES work.

vom at ocl:~$ grep ^server /etc/ntp.conf | grep fe80
server fe80::fa32:e4ff:feXX:XXXX%eth0

vom at ocl:~$ ntpq -pn
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
-104.41.150.68   129.6.15.30      2 u   34  128  377   37.618   17.096   5.323
-38.113.126.207  128.101.101.101  3 u   39  128  377   84.850  -17.765   1.417
+2604:a880:800:1 128.138.141.172  2 u   49  128  377   41.186   -7.889   2.221
*104.131.51.97   199.102.46.70    2 u   50  128  377   41.627    5.255   2.818
+2001:67c:1560:8 140.203.204.77   2 u   39  128  377  108.130   -8.106   3.573
 fe80::fa32:e4ff .INIT.          16 -    - 1024    0    0.000    0.000   0.000

vom at ocl:~$ ntpq -c version
ntpq 4.2.6p5 at 1.2349-o Wed Nov 11 17:59:04 UTC 2015 (1)

vom at ocl:~$ sudo service ntp stop
[sudo] password for vom:
 * Stopping NTP server ntpd
   …done.

vom at ocl:~$ sudo ntpdate fe80::fa32:e4ff:feXX:XXXX%eth0
18 Dec 12:25:30 ntpdate[5219]: adjust time server fe80::fa32:e4ff:feXX:XXXX offset -0.019905 sec

--
Brandon Applegate - CCIE 10273
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