ExtremeXOS supports the client portion of the SNTP Version 3 based on RFC4330.
SNTP can be used by the switch to update and synchronize its internal clock from a Network Time Protocol (NTP) server. After SNTP has been enabled, the switch sends out a periodic query to the indicated NTP server, or the switch listens to broadcast NTP updates. In addition, the switch supports the configured setting for Greenwich Mean time (GMT) offset and the use of Daylight Saving Time.