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Network Time Sync

    Question


  • Dear Experts, we have 4 Active directory sites (USA, AUSTRLIA, INDIA and Singapore). PDC role is in USA and All Servers are VMs (Some are configured in Private Clouds and couple of are in Public Clouds).
    We are experiencing time sync issue between member servers especially with Linux Servers. One of Linux Server is configured as File server and authentication keeps failing due to time sync issue.  If I check status I get below mentioned info on PDC. Can someone help me to configure proper time sync in complete network

    C:\Windows\system32>w32tm /query /status
    Leap Indicator: 0(no warning)
    Stratum: 1 (primary reference - syncd by radio clock)
    Precision: -6 (15.625ms per tick)
    Root Delay: 0.0000000s
    Root Dispersion: 10.0000000s
    ReferenceId: 0x4C4F434C (source name:  "LOCL")
    Last Successful Sync Time: 13/07/2012 07:28:08
    Source: Free-running System Clock
    Poll Interval: 6 (64s)

    C:\Windows\system32>w32tm /query /configuration
    [Configuration]

    EventLogFlags: 2 (Local)
    AnnounceFlags: 10 (Local)
    TimeJumpAuditOffset: 28800 (Local)
    MinPollInterval: 6 (Local)
    MaxPollInterval: 10 (Local)
    MaxNegPhaseCorrection: 172800 (Local)
    MaxPosPhaseCorrection: 172800 (Local)
    MaxAllowedPhaseOffset: 300 (Local)

    FrequencyCorrectRate: 4 (Local)
    PollAdjustFactor: 5 (Local)
    LargePhaseOffset: 50000000 (Local)
    SpikeWatchPeriod: 900 (Local)
    LocalClockDispersion: 10 (Local)
    HoldPeriod: 5 (Local)
    PhaseCorrectRate: 7 (Local)
    UpdateInterval: 100 (Local)


    [TimeProviders]

    NtpClient (Local)
    DllName: C:\Windows\system32\w32time.dll (Local)
    Enabled: 1 (Local)
    InputProvider: 1 (Local)
    CrossSiteSyncFlags: 2 (Local)
    AllowNonstandardModeCombinations: 1 (Local)
    ResolvePeerBackoffMinutes: 15 (Local)
    ResolvePeerBackoffMaxTimes: 7 (Local)
    CompatibilityFlags: 2147483648 (Local)
    EventLogFlags: 1 (Local)
    LargeSampleSkew: 3 (Local)
    SpecialPollInterval: 3600 (Local)
    Type: NT5DS (Local)

    NtpServer (Local)
    DllName: C:\Windows\system32\w32time.dll (Local)
    Enabled: 1 (Local)
    InputProvider: 0 (Local)
    AllowNonstandardModeCombinations: 1 (Local)

    VMICTimeProvider (Local)
    DllName: C:\Windows\System32\vmictimeprovider.dll (Local)
    Enabled: 1 (Local)
    InputProvider: 1 (Local)

    Regards Suman B. Singh

    Friday, July 13, 2012 12:12 PM

Answers

  • Hi,

    I noticed that some are configured in Private Clouds and couple of are in Public Clouds. I’m a little bit confused about your description; you mean all the servers in private and public could experience the network time issue? Please let me know which server is your reference server, which server is the target/issued server.

    From the output of w32tm /query /status, we could find that the last successful sync time is 13/07/2012 07:28:08. At first, you need to check the networking condition among the server.

    If the network traffic is fine, you might need to manually align the time via w32tm command.

    w32tm /config

    Then you need to enable the debug for the Windows Time service.

    w32tm /debug /enable /file:<name> /size:<bytes>

    Also you could look into the Event Viewer on the issued server to verify whether there are some related errors or warnings included.

    Regards,
    James


    James Xiong

    TechNet Community Support

    Monday, July 16, 2012 7:43 AM
    Moderator