Hello:
I`m trying to set up a NTP subnet over a LAN. This subnet has following
structure:
1.-NTP Server
This server also is a client from another "central server" outside my LAN..
My /etc/ntp.conf file is like this:
server EESS_NTPSRV_1
server 127.127.1.0
fudge 127.127.1.0 stratum 5
restrict 172.19.250.0 mask 255.255.255.224 notrust nomodify notrap
broadcast 172.19.250.31
authentication no
driftfile /etc/ntp/drift
tinker dispersion 1.000
statsdir /var/log/ntp/
filegen peerstats file peerstat.log enable
EESS_NTPSRV_1 is the server outside my LAN "172.19.250.0". I want use my NTP
server as broadcast server.
2.-NTP clients
In this case, /etc/ntp.conf is like this:
driftfile /etc/ntp/drift
broadcastclient
authenticate no
statsdir /var/log/ntp/
filegen peerstats file peerstat.log enable
My NTP Server seems synchronize OK with EESS_NTPSRV_1, as shows an `ntpq -p` :
remote refid st t when poll reach delay offset jitter
==============================================================================
LOCAL(0) LOCAL(0) 5 l 3 64 377 0.000 0.000 0.008
172.19.250.31 0.0.0.0 16 - - 64 0 0.000 0.000 4000.00
*EESS_NTPSRV_1 172.31.61.173 2 u 48 64 377 52.855 -495811 0.008
An `ntpq -c rv` over my NTP Server shows:
status=06a4 leap_none, sync_ntp, 10 events, event_peer/strat_chg,
version="ntpd [EMAIL PROTECTED] Tue Jan 28 15:20:29 CET 2003 (1)",
processor="i686", system="Linux2.4.20-28.7", leap=00,
stratum=3, precision=-17, rootdelay=60.590, rootdispersion=705358.888,
peer=42678, refid=ces_ssh,
reftime=c81ddb99.b86a7ef9 Tue, May 23 2006 21:06:01.720, poll=6,
clock=c81ddbb8.0e33df2a Tue, May 23 2006 21:06:32.055, state=3,
offset=-494949.280, frequency=-500.000, jitter=0.011,
stability=16134.000
My NTP Client seems doing anything; when execute ntpq -p shows the following:
remote refid st t when poll reach delay offset jitter
==============================================================================
nothing else.
If I execute `ntpq -c rv` over my NTP Client shows:
status=c011 sync_alarm, sync_unspec, 1 event, event_restart,
version="ntpd 4.1.0 Wed Sep 5 06:54:30 EDT 2001 (1)", processor="i686",
system="Linux2.4.7-10", leap=11, stratum=16,
precision=-15, rootdelay=0.000, rootdispersion=0.945, peer=0,
refid=0.0.0.0, reftime=00000000.00000000 Thu, Feb 7 2036 7:28:16.000,
poll=4, clock=c81ddb94.a4db7ae5 Tue, May 23 2006 21:05:56.643, state=1,
offset=0.000, frequency=0.000, jitter=0.031, stability=0.000
Also, I`ve used tcpdump to check if my server sends broadcast packets. When I
execute `tcpdump -n -i eth0 port 123` from my client:
19:24:41.241764 172.19.250.3.ntp > 172.19.250.2.ntp: v4 client strat 0 poll 6 p
rec -16 (DF) [tos 0x10]
19:24:41.241764 172.19.250.2.ntp > 172.19.250.3.ntp: v4 server strat 3 poll 6 p
rec -17 (DF) [tos 0x10]
19:24:45.611764 172.19.250.2.ntp > 172.19.250.31.ntp: v4 bcast strat 3 poll 6 p
rec -17 (DF) [tos 0x10]
19:24:58.241764 172.19.250.3.ntp > 172.19.250.2.ntp: v4 client strat 0 poll 6 p
rec -16 (DF) [tos 0x10]
19:24:58.241764 172.19.250.2.ntp > 172.19.250.3.ntp: v4 server strat 3 poll 6 p
rec -17 (DF) [tos 0x10]
19:25:16.241764 172.19.250.3.ntp > 172.19.250.2.ntp: v4 client strat 0 poll 6 p
rec -16 (DF) [tos 0x10]
19:25:16.241764 172.19.250.2.ntp > 172.19.250.3.ntp: v4 server strat 3 poll 6 p
rec -17 (DF) [tos 0x10]
19:25:34.241764 172.19.250.3.ntp > 172.19.250.2.ntp: v4 client strat 0 poll 6 p
rec -16 (DF) [tos 0x10]
19:25:34.241764 172.19.250.2.ntp > 172.19.250.3.ntp: v4 server strat 3 poll 6 p
rec -17 (DF) [tos 0x10]
19:25:48.601764 172.19.250.2.ntp > 172.19.250.31.ntp: v4 bcast strat 3 poll 6 p
rec -17 (DF) [tos 0x10]
19:25:52.241764 172.19.250.3.ntp > 172.19.250.2.ntp: v4 client strat 0 poll 6 p
rec -16 (DF) [tos 0x10]
19:25:52.241764 172.19.250.2.ntp > 172.19.250.3.ntp: v4 server strat 3 poll 6 p
rec -17 (DF) [tos 0x10]
172.19.250.2 is NTP Server address
172.19.250.3 is NTP Client address
172.19.250.31 is LAN broadcast address
It seems that my client is receving NTP broadcast packets...but it doesn´t work.
Can anyone helps me?
Thanks,
Carlos.
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