Fix for NTP error "No association ID's returned"

So today I came across an error wherein I was unable to get NTP running.

I started the service via svcadm like this:

# svcadm restart network/ntp

When I ran 'ntpq -p' to check the status I got the below error:

# ntpq -p
No association ID's returned

The configuration file looked good & had entries for the relevant NTP servers.

# cat /etc/inet/ntp.conf
server ntp1.vodafone.com.au
server ntp2.vodafone.com.au
server ntp3.vodafone.com.au
server ntp4.vodafone.com.au
server ntp5.vodafone.com.au

I then did a manual sync with one of the NTP server listed in the file & that did the trick.

# ntpdate -u ntp1.vodafone.com.au

25 Apr 14:55:05 ntpdate[49624]: adjust time server 10.105.138.4 offset 0.007227 sec

After the manual sync all five NTP servers were detected & were showing up in the output of ntpq -p:

#  ntpq -p

     remote           refid      st t when poll reach   delay   offset    disp

====================================================================

-ntp1.vodafone.c .GPS.            1 u   56   64   77     0.34    2.185  376.19

-ntp2.vodafone.c .GPS.            1 u   56   64   77    13.17    2.123  376.25

*ntp3.vodafone.c .GPS.            1 u   56   64   77    17.26    2.234  376.25

+ntp4.vodafone.c .GPS.            1 u   56   64   77    19.07    2.289  376.19

+ntp5.vodafone.c .GPS.            1 u   56   64   77    46.33    2.268  376.21