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Configuring w32tm on DC/GC Windows (ntp)

Paolo Caparrelli Networking Windows 22 June 2022

 

w32tm /config /manualpeerlist:”ntp.goline.ch,ntp2.goline.ch” /reliable:yes /update

w32tm /config /manualpeerlist:[server],0x8 /syncfromflags:MANUAL 
The actual IP address of the NTP server or its host name must be entered instead of [server]
The flag "0x8" forces w32time not to send "symmetric active" packets but normal "client" requests which the NTP server replies to as usual.

Then the following command can be used to immediately make the changes effective:

w32tm /config /update 
If this command has completed successfully your system clock has synchronized to the given NTP server. To check it open a Date and Time window (click "time" icon in the lower right corner of the desktop) -> Change date and time settings -> Internet Time. You should see something similar to Figure 6.

Alternatively, the w32time service can be restarted:

net stop w32time 
net start w32time

The command:

w32tm /query /peers
can be used to check the configuration. The output should look similar to the line below:

#Peers: 1
Peer: ntp.goline.ch,0x2
State: Active
Time Remaining: 221.4934473s
Mode: 1 (Symmetric Active)
Stratum: 2 (secondary reference – syncd by (S)NTP)
PeerPoll Interval: 8 (256s)
HostPoll Interval: 8 (256s)

The current SNTP value is:[server],0x8

If the w32time service is restarted it sends immediately a request to the NTP server. Additionally, the command:

w32tm /resync 
can be used to let w32time send a request.

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