Other NTP Configuration Options
Other NTP configuration options, such as reference clock support (the fudge command) and address restriction, were not tested for the recommended configuration in this article. Almost all of the supported commands and options of xntpd(1M) can still be used for configuring NTP on the SCs and domains. However, they are not necessary for the minimum recommended configuration in this article.
Do not use the SLEWALWAYS option on the Sun Fire 15K/12K server. Using this option could prevent NTP from fixing the time drift.
Consult xntpd(1M) for the full list of configuration options. For public NTP servers, check the Public NTP Server list on: http://www.ntp.org