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lyallp
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Joined: 15 Jul 2004
Posts: 1610
Location: Adelaide/Australia
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 Posted: Sun Mar 29, 2009 3:58 am Post subject: [Solved] NTP packets every 10 seconds or so... |
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I was fiddling with WireShark and I noticed that I have NTP packets around every 10 seconds on a system that has been up for over 4 hours.
Whilst I understand this is the Network Time Protocol, I would have thought that these interactions would have been rather rapid on startup and then, once the clock is set, non existent.
How many NTP packets should I expect? Is this normal?
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...Lyall
Last edited by lyallp on Sun Mar 29, 2009 6:51 am; edited 1 time in total |
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d2_racing
Bodhisattva
Joined: 25 Apr 2005
Posts: 13047
Location: Ste-Foy,Canada
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| Posted: Sun Mar 29, 2009 4:00 am Post subject: |
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Hi, I have no idea.
Can you post your ntp setting plz ? |
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lyallp
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Joined: 15 Jul 2004
Posts: 1610
Location: Adelaide/Australia
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| Posted: Sun Mar 29, 2009 4:09 am Post subject: |
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| Code: | # $OpenBSD: ntpd.conf,v 1.7 2004/07/20 17:38:35 henning Exp $
# sample ntpd configuration file, see ntpd.conf(5)
# Addresses to listen on (ntpd does not listen by default)
#listen on *
#listen on 127.0.0.1
#listen on ::1
# sync to a single server
#server ntp.example.org
# use a random selection of 8 public stratum 2 servers
# see http://twiki.ntp.org/bin/view/Servers/NTPPoolServers
servers pool.ntp.org
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After having a quick look in http://twiki.ntp.org/bin/view/Servers/NTPPoolServers, I may try setting my pool to a geographically closer one, ie, oceania.pool.ntp.org, but still, the above is my config.
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doctork
Guru
Joined: 25 Apr 2004
Posts: 370
Location: Cleveland, OH
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| Posted: Sun Mar 29, 2009 4:42 am Post subject: |
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You can check how ntpd is running with:
For example, on one of my systems:
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me@fino ~/etc $ ntpq -cpeers
remote refid st t when poll reach delay offset jitter
==============================================================================
*darkcity.cerias .GPS. 1 u 290 1024 377 49.272 0.940 0.279
+repos.lax-noc.c 209.81.9.7 2 u 300 1024 377 83.850 10.142 0.175
+socorro.dayww.n 132.163.4.101 2 u 284 1024 377 50.656 -16.771 1.137
-dwarf.dr-korpi. 63.240.161.99 3 u 763 1024 377 0.106 12.920 0.802
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Tells me that the various servers are being polled every 1024 seconds.
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lyallp
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Joined: 15 Jul 2004
Posts: 1610
Location: Adelaide/Australia
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| Posted: Sun Mar 29, 2009 5:22 am Post subject: |
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Cool, any chance you can tell me which package ntpq is in?
I am using net-misc/openntpd version 3.9_p1-r1
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doctork
Guru
Joined: 25 Apr 2004
Posts: 370
Location: Cleveland, OH
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| Posted: Sun Mar 29, 2009 6:19 am Post subject: |
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It's in net-misc/ntp. I'm using that rather than openntpd -- I don't know if similar is available with openntpd.
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gentoo_ram
Guru
Joined: 25 Oct 2007
Posts: 520
Location: San Diego, California USA
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| Posted: Sun Mar 29, 2009 6:30 am Post subject: |
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| OpenNTP? Ewww... gosh only knows what it's doing. net-misc/ntp is the one you want. |
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lyallp
Veteran
Joined: 15 Jul 2004
Posts: 1610
Location: Adelaide/Australia
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| Posted: Sun Mar 29, 2009 6:51 am Post subject: |
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I have unmerged openntpd and emerged net-misc/ntp
Now, I have ntpq.
My NTP traffic seems to be reduced now.
| Code: | # ntpq -cpeers
remote refid st t when poll reach delay offset jitter
==============================================================================
yarrina.connect 128.250.33.242 2 u 4 1024 1 53.211 4.046 0.001
bitburger.rumbl 192.231.203.132 3 u 4 1024 1 177.449 53.044 0.001
pond.thecave.ws 128.250.37.2 2 u 3 1024 1 48.430 -7.458 0.001
gw.voipwa.net.a 155.101.3.114 3 u 2 1024 1 57.203 8.343 0.001
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I tweaked my config (surrounded by *, but not including *) as ...
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# Pools for Gentoo users
server 0.gentoo.pool.ntp.org *minpoll 10 maxpoll 11*
server 1.gentoo.pool.ntp.org *minpoll 10 maxpoll 11*
server 2.gentoo.pool.ntp.org *minpoll 10 maxpoll 11*
server 3.gentoo.pool.ntp.org *minpoll 10 maxpoll 11*
# you should not need to modify the following paths
driftfile /var/lib/ntp/ntp.drift
# To deny other machines from changing the
# configuration but allow localhost:
restrict default nomodify nopeer
restrict 127.0.0.1
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