Re: Help with xntp config ( xntpd on AIX 5.1 and 5.2 )

From: Doug Freyburger (dfreybur_at_yahoo.com)
Date: 05/21/04 

Date: 21 May 2004 10:44:38 -0700

Chris Allen wrote:
>
> I would like one server in the PROD environment to be the one system
> that syncs its time with clocks outside of our company. Would this
> system be considered a stratum 1 system?

No. A stratum 1 server is a server that is directly connected to
an atomic clock or similarly accurate independent time source. If
you connect over the Internet, your machine will have a stratum
number N+1 compared to whoever you sync with.

> I'm trying to setup an ntp hierarchy and I'm getting more and more
> confused by the stratum, server, peer, fudge, and prefer settings in
> the /etc/ntp.conf file.

Stratum - Number of server hops away from an atomic clock.

Server - Accept time from that machine but do not offer time to it.

Peer - Accept time from that machine and also supply time to it.

Client - The machine specified gets time, but always ignore any
time it gives.

Fudge - Known amount of error in your hardware clock, very much
voodoo and black magic to many folks.

Prefer - Is this which server to give preference, or which protocol
version to give preference?

Relevant Pages

  • Re: Isolated Network Drift Problem
    ... No. PCs keep time even without NTP installed. ... clock reference will be able to provide time to NTP clients. ... page at ntp.org I'm thinking that a combination of a master server using ... If it is not possible for you to have your own stratum 1 time server, there are a fair number of them on the internet. ...
    (comp.protocols.time.ntp)
  • Re: Synchronize clocks without a reference clock
    ... to each other even if you weren't using orphan mode, ... minimum of 2 stratum difference" hack that has been the standard ... still picking a single clock to follow, only now it's a random one. ... isolated site it may still happen that a very slow or very fast server ...
    (comp.protocols.time.ntp)
  • Re: Isolated Network Drift Problem
    ... configured on a local time server. ... designated as a server with its undisciplined clock set at stratum 5. ... In your situation I might well strongly advice chrony instead of ntpd as ...
    (comp.protocols.time.ntp)
  • Re: Which release notes say sts$manager:utc$configure_tdf is obsolete
    ... >>in UTC, and after comparing it to the time as determined from its ... I think it will only attempt to change the clock if it is less than ... or a ST clock just after the spring forward, and NTP would fix it. ... guess of the real time that it makes from polling the time server. ...
    (comp.os.vms)
  • Re: Easy NTP Time Server question for the experts out there.
    ... >> I want to setup my server to automatically check the time on an NTP ... >> able to set the time from the command prompt with the ntpdate command. ... In some cases it may not be practical for ntpd to run continuously. ... to exit just after setting the clock for the first time. ...
    (alt.os.linux.suse)