From: Hunt Lee (huntl@webcentral.com.au)
Date: Tue Jan 07 2003 - 03:32:11 GMT-3
As you said, RTA is already at the stratum 6, while my Win XP is on stratum
12, so it is already lower...
I have just moved RTA to stratum 3 just in case, yet no luck =(
Regards,
H.
-----Original Message-----
From: Solomon Ghebremariam [mailto:sghebrem@cisco.com]
Sent: Tuesday, 7 January 2003 4:19 PM
To: Hunt Lee
Subject: Re: NTP broadcast help!!!
I think the default stratum is 7 so can you try 3. If the stratum of the
master is equal or greater than the client then it will ignore it. I think
:)
At 02:47 PM 1/7/2003 +1000, you wrote:
>Hey group,
>
>Got 2 questions regarding NTP.
>
> I have the following setup in my lab:-
>
>NTP Server (win XP) RTA (NTP Master) RTB (NTP
>Broadcast Client)
> | |
>|
>---------------------------------------------------------------------------
-
>-------------------------------------- Ethernet
>
>Win XP - 25.100.61.10 /24
>RTA - 25.100.61.1 /24
>RTB - 25.100.61.2 /24
>
>Ok. The NTP server is setup to broadcast NTP (out 255.255.255.255) on the
>Ethernet. I have 2 things that I am confused about.
>
> - Firstly, on RTA, I have set it up as NTP Master 7, yet RTB failed to
pick
>it up.
>
>At RTA:-
>
>ntp master 7
>
>& I have setup RTA's clock with the "clock set" command...
>
>RTA#sh ntp associations
>
>
> address ref clock st when poll reach delay offset
>disp
>*~127.127.7.1 127.127.7.1 6 23 64 377 0.0 0.00
>0.0
> * master (synced), # master (unsynced), + selected, - candidate, ~
>configured
>RTA#
>
>RTA#sh ntp status
>Clock is synchronized, stratum 7, reference is 127.127.7.1
>
>nominal freq is 250.0000 Hz, actual freq is 250.0000 Hz, precision is 2**16
>
>reference time is C1C56122.1DB66112 (14:22:26.116 UTC Tue Jan 7 2003)
>
>clock offset is 0.0000 msec, root delay is 0.00 msec
>
>root dispersion is 0.02 msec, peer dispersion is 0.02 msec
>
>RTA#
>
>But at RTB, even though it is running in NTP client broadcast, it only
>manages to receive the NTP broadcast from the NTP Server (Win XP), but not
>from RTA...
>
>RTB#sh ntp associations
>
>
> address ref clock st when poll reach delay offset
>disp
>* 25.100.61.10 204.123.2.5 12 2056 8192 3 30.1 3.19
>1.0
> * master (synced), # master (unsynced), + selected, - candidate, ~
>configured
>RTB#
>
>RTB#sh ntp status
>Clock is synchronized, stratum 13, reference is 25.100.61.10
>
>nominal freq is 250.0000 Hz, actual freq is 250.0000 Hz, precision is 2**18
>
>reference time is C1C4CCFD.919D5ADB (03:50:21.568 UTC Tue Jan 7 2003)
>
>clock offset is 3.1927 msec, root delay is 30.14 msec
>
>root dispersion is 4.15 msec, peer dispersion is 0.96 msec
>
>RTB#
>
>
>So my first question is, if a router is running "ntp broadcast client", can
>it only receive one NTP source's broadcast???
>Or is there any other commands that I will need to add on top of the "ntp
>master <7>" command?
>
>
>My second question is that, how often does the NTP gets synchronized??
Does
>it gets any forms of "hello packets" / keepalive packets to see if it's NTP
>server is up??? The reason I asked is because even if I took off the "ntp
>broadcast client" command (given that I don't have any static NTP servers
by
>"ntp server" command or anything else at all, how come RTB is still saying
>it sync to the Win XP??
>
>n.b:- I even tried to disconnect the Ethernet cable from the Win XP, yet
>RTB still claims that it is sync to it...
>
>
>Any help would be greatly appreciated.
>
>Best Regards,
>Hunt Lee
>.
.
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