When you use the W32tm command to test / maintain time synchronization in your enterprise, using the -v ( verbose) switch on a domain controller will generate:
RPC to server -v returned 0x6ba.
Additionally, you may receive:
W32Time: Server: Binding to 1 NIC. W32Time: bind failed: 0x80072740 W32Time: 0xC0000031 reported to System Log in Event Viewer W32Time: BEGIN:FinishCleanup W32Time: BEGIN:TsUpTheThread W32Time: END Line 1384 W32Time: BEGIN:UnInitializeDC W32Time: Ptrs 0 - 0 W32Time: END:Line 725 W32Time: Time service stopped. W32Time: END:Line 383and the Event log may contain:
Event Type: Error Event Source: w32time Event Category: None Event ID: 49 Date: xx/xx/2000 Time: 10:49:44 AM User: N/A Computer: machinename Description: An unexpected error occurred while trying to start the server. The port may already be in use. Data: 0000: 00 00 00 00 ....The problem is caused by the command trying to start the time service, which is already running on default port 123.
To workaround the problem, only use the following switches when running W32tm on a domain controller:
-tz -adj -adjoff -sIf you want to use other options on a DC, use the -p switch to change the port.
The W32tm command supports the following switches:
w32tm \[ -tz | -s \[computer\] | -adj | -adjoff | -source | -once \] \[-test\] \[-v\] \[-p <port>\] \[-period <freq>\] Primary options: -tz print the local time zone info and exit. -s \[<computer>\] force the given computer (or the local computer if none is given) to resynchronize, then exit. -adj set the computer's system clock frequency to the last frequency determined during synchronization, then exit. -adjoff set the computer's system clock frequency the system default, then exit -source choose a synchronization source, then exit. Note that a source is chosen before each synchronization, so this is useful only in showing that a source could be found. Remember to use -v to see the output. -once do only one synchronization, then exit. Otherwise, run continuously as a client, synchronizing the local clock until ctrl-c is pressed. The program will also run as a server any time the service would (when it is on a DC, or when the registry flag is set). The following options can be used in conjunction with the above: -test prevent the time on the local system from actually being modified. -v print out a verbose description of what the program is doing. This is usually needed since otherwise the program produces no output. The exceptions are -s and -tz. -p
set the server port. -period set the sync period just as in the registry. That is: 0 times per day.