Groups > linux.debian.user > #201620

Re: ntp problem in broadcastclients

From	Greg Wooledge <wooledg@eeg.ccf.org>
Newsgroups	linux.debian.user
Subject	Re: ntp problem in broadcastclients
Date	2018-10-25 14:30 +0200
Message-ID	<wMMVX-7kB-1@gated-at.bofh.it> (permalink)
References	<wMqsq-2dH-5@gated-at.bofh.it> <wMqLM-2k2-9@gated-at.bofh.it> <wMskx-3lD-5@gated-at.bofh.it> <wMzP3-7OO-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

On Wed, Oct 24, 2018 at 06:23:49PM -0400, Gene Heskett wrote:
> The idea is to reduce the loading of 7 machines all banging one the level 
> 1 and 2 servers by designating one machine to bang of the debian pool, 
> and then broadcast it on the local 192.169.xx.xx net so all the others 
> stay within a millisecond of this machine.

Well yeah, of course, but you don't need "broadcast" for that.

Here at work, I chose three of my servers to act as the local NTP sources
for all of the other servers and workstations.  In our local DNS, I created
records to point to those machines as ntp1, ntp2 and ntp3.  (They also have
other names besides these.  These are just their NTP names.)

On ntp1, one of the local "servers", the /etc/ntp.conf file has:

pool 0.debian.pool.ntp.org iburst
pool 1.debian.pool.ntp.org iburst
pool 2.debian.pool.ntp.org iburst
pool 3.debian.pool.ntp.org iburst

Ntp2 and ntp3 have the same thing, or at least they should.

On my workstation, those lines are commented out, and I added:

server ntp1.eeg.ccf.org
server ntp2.eeg.ccf.org
server ntp3.eeg.ccf.org

This is how a "normal" (in my experience) LAN handles NTP.  Yes,
there's manual configuration of each machine, but I don't find that to
be a burden.  It's just those crazy kids these days that think everything
has to be done with multiple layers of Rube Goldberg devices.

> 2 machines report:
> pi@picnc:/etc $ ntpq -p
> No association ID's returned

I've literally never seen such a message before.  I googled it, and there
are definitely results that look relevant.  After adding "broadcast" to
the search terms, I came up with this result:

http://lists.ntp.org/pipermail/questions/2014-December/039401.html

Looks like a good starting point for your "broadcast" configuration.
I hope this helps.

Thread

ntp problem in broadcastclients Gene Heskett <gheskett@shentel.net> - 2018-10-24 14:30 +0200
  Re: ntp problem in broadcastclients Greg Wooledge <wooledg@eeg.ccf.org> - 2018-10-24 14:50 +0200
    Re: ntp problem in broadcastclients john doe <johndoe65534@mail.com> - 2018-10-24 16:30 +0200
      Re: ntp problem in broadcastclients rhkramer@gmail.com - 2018-10-24 17:10 +0200
        Re: ntp problem in broadcastclients Gene Heskett <gheskett@shentel.net> - 2018-10-25 00:30 +0200
          Re: ntp problem in broadcastclients rhkramer@gmail.com - 2018-10-25 01:20 +0200
            Re: ntp problem in broadcastclients rhkramer@gmail.com - 2018-10-25 01:20 +0200
      Re: ntp problem in broadcastclients Gene Heskett <gheskett@shentel.net> - 2018-10-25 00:30 +0200
        Re: ntp problem in broadcastclients Greg Wooledge <wooledg@eeg.ccf.org> - 2018-10-25 14:30 +0200
          Re: ntp problem in broadcastclients Curt <curty@free.fr> - 2018-10-25 15:40 +0200
            Re: ntp problem in broadcastclients Gene Heskett <gheskett@shentel.net> - 2018-10-25 20:10 +0200
              Re: ntp problem in broadcastclients Curt <curty@free.fr> - 2018-10-25 20:20 +0200
                Re: ntp problem in broadcastclients Gene Heskett <gheskett@shentel.net> - 2018-10-25 22:50 +0200
                Re: ntp problem in broadcastclients Greg Wooledge <wooledg@eeg.ccf.org> - 2018-10-25 23:00 +0200
                Re: ntp problem in broadcastclients Gene Heskett <gheskett@shentel.net> - 2018-10-25 23:40 +0200
                Re: ntp problem in broadcastclients Greg Wooledge <wooledg@eeg.ccf.org> - 2018-10-26 14:30 +0200
                Re: ntp problem in broadcastclients Gene Heskett <gheskett@shentel.net> - 2018-10-26 15:40 +0200
                Re: ntp problem in broadcastclients Greg Wooledge <wooledg@eeg.ccf.org> - 2018-10-26 16:00 +0200
                Re: ntp problem in broadcastclients Gene Heskett <gheskett@shentel.net> - 2018-10-26 16:40 +0200
                Re: ntp problem in broadcastclients Curt <curty@free.fr> - 2018-10-26 15:10 +0200
                Re: ntp problem in broadcastclients Gene Heskett <gheskett@shentel.net> - 2018-10-26 15:50 +0200
                Re: ntp problem in broadcastclients Michael Stone <mstone@debian.org> - 2018-10-26 16:30 +0200

csiph-web