NTP Configuration for Time Sync
Introduction : Windows Time Service(w32tm) with help of Network Time Protocol synchronize time with most reliable time sourced from top, if more than one referral time sources are available, then with help of NTP algorithm, NTP client select best one base on its ability to sync time. Stratum: External Time sources are defined according to its time accuracy/reliability by Stratum, lower the value, higher accuracy. Stratum 0 – Hardware Nuclear Clock, GPS Clock, Radio Clock. Stratum 1 connect to Stratum 0 & Stratum 2 with Stratum 1. These clocks are referral clock. The Stratum value define the synchronization distance to referral clock. Time Synchronization Process: Referral clock & our NTP server sync time with these referrals clock & its client sync with NTP Server time. The time difference between local clock & NTP is called “skew time”. Normally time service adjust time by changing the clock rate, but if the difference is too large to adjust, time servic