amigan_99
asked on
How to verify NTP is working ok on DC?
I have some Cisco gear complaining about NTP. A couple of days ago I asked on here how to run a check to see if NTP was running. You can see the command below. A couple more questions
today.. On the Windows 2008 server how can I see what the DC (10.10.10.139) is using as its NTP source? Also - what are the d: and o: values in the output of the w32tm command below?
C:\Users\medfly>w32tm /stripchart /computer:10.10.10.139 /samples:9
Tracking 10.10.10.139 [10.10.10.139:123].
Collecting 9 samples.
The current time is 10/8/2011 9:17:44 AM.
09:17:44 d:+00.0310000s o:+05.7559184s [ |
* ]
09:17:46 d:+00.0310000s o:+05.7578982s [ |
* ]
09:17:48 d:+00.0300000s o:+05.7517522s [ |
* ]
09:17:50 d:+00.1140000s o:+05.8054868s [ |
* ]
09:17:52 d:+00.0620000s o:+05.7797182s [ |
* ]
09:17:54 d:+00.0250000s o:+05.7505722s [ |
* ]
09:17:56 d:+00.0370000s o:+05.7535520s [ |
* ]
09:17:58 d:+00.0320000s o:+05.7560318s [ |
* ]
09:18:01 d:+00.0270000s o:+05.7565116s [ |
* ]
today.. On the Windows 2008 server how can I see what the DC (10.10.10.139) is using as its NTP source? Also - what are the d: and o: values in the output of the w32tm command below?
C:\Users\medfly>w32tm /stripchart /computer:10.10.10.139 /samples:9
Tracking 10.10.10.139 [10.10.10.139:123].
Collecting 9 samples.
The current time is 10/8/2011 9:17:44 AM.
09:17:44 d:+00.0310000s o:+05.7559184s [ |
* ]
09:17:46 d:+00.0310000s o:+05.7578982s [ |
* ]
09:17:48 d:+00.0300000s o:+05.7517522s [ |
* ]
09:17:50 d:+00.1140000s o:+05.8054868s [ |
* ]
09:17:52 d:+00.0620000s o:+05.7797182s [ |
* ]
09:17:54 d:+00.0250000s o:+05.7505722s [ |
* ]
09:17:56 d:+00.0370000s o:+05.7535520s [ |
* ]
09:17:58 d:+00.0320000s o:+05.7560318s [ |
* ]
09:18:01 d:+00.0270000s o:+05.7565116s [ |
* ]
Also, this command should help you identify if NTP is working
where computers could be any computer.
Hope this helps!
w32tm /monitor /computers:time.windows.com,0.pool.ntp.org,1.pool.ntp.org
where computers could be any computer.
Hope this helps!
ASKER
The o: Offset seems to keep incrementing. You can see when I posted just a while ago it was 5.75 and no it's over 6. Earlier it was in the 4's. Can you tell me what the offset means exactly?
C:\Users\medfly>w32tm /monitor /computers:10.10.10.139
10.10.10.139[10.10.10.139:
ICMP: 25ms delay
NTP: +6.0800876s offset from local clock
RefID: usno.pa-x.dec.com [204.123.2.72]
Stratum: 2
Warning:
Reverse name resolution is best effort. It may not be
correct since RefID field in time packets differs across
NTP implementations and may not be using IP addresses.
One the server I see:
C:\Users\superuser>w32tm /query /source
usno.pa-x.dec.com,0x1
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ASKER
Thanks much. I think the problem is that CPU on the DC is spiking
causing service availability issue intermittently.
BTW - the offset is in milliseconds?
causing service availability issue intermittently.
BTW - the offset is in milliseconds?
Thanks ..
The offset is in seconds... see a s at the end... o:+05.7559184s
The offset is in seconds... see a s at the end... o:+05.7559184s
If thats your question you can find out current NTP Server configuration in the following registry key.
HKEY_LOCAL_MACHINE\SYSTEM\
or using the following command
Open in new window
and regard d and o
D- Stands for Drift or Delay
O- Offset
Hope this helps...