What is the correct error bound between client and server? In the RFC documentation I read one thing and in many theads another. I'm confused so please help me. Which is correct?
1) In the documentation for RFC1305 p. 102 it can be read that the true offset between client and server must lie somewhere in the correctness interval, defined by I=[theta - delta/2 - epsilon, theta + delta/2 + epsilon] 2) And in threads and websites I usuallly see the statement that the error is bounded with half the roundtrip. And it sure look like that when scatter diagram(wedge plots) with offset as a function rtt are viewed. ------- To bound the error to the root of the synchronization subnet. Here, upper-case variables are used relative to the primary reference source (s), i.e., via a peer to the root of the synchronization subnet. Since offset, dispersion and delay(rtt) are all additive, you easily sum up all variables from the primary server to server i and achieve OFFSET sub i, ROOT DISPERSION sub i and ROOT DELAY sub i to the root. The synchronization distance, sometimes called the root distance, is calculated with DELTA/2 + EPSILON and represents the biggest statistical error. So the true offset relative to a primary reference server must be contained in the interval [OFFSET- SYNC.DIST, OFFSET +SYNC.DIST.] If the 1) alternative is right, all the other would be much more consistently. Thanks in advance _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
