Description of problem: If you list devices in /etc/ntp/step-tickers which only support NTP version 3, ntpdate will fail. Either ntpdate should use version 3, as most (all?) version 4 clients will also support it, or step-tickers should be extended to allow an optional version number to be provided.
This is a duplicate of bug #202204. When the feature is implemented, "-o 3" can be added to NTPDATE_OPTIONS in /etc/sysconfig/ntpd. *** This bug has been marked as a duplicate of 202204 ***