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    Synchronizing NTP Time Sources to Ensure Consistent Behavior Among Nodes

    To ensure consistent behavior among all nodes in a multinode fabric, each node’s time must be synchronized with every other node in the fabric. When you configure each NSM4000 appliance with an NTP server, you ensure that, if the first node (which is used to synchronize time for all nodes in the fabric) goes down, all other nodes in the fabric remain synchronized. To ensure this behavior, all nodes in a fabric must use the same external NTP source that you configure for the first appliance.

    Note: By default, NSM4000 translates time so that the time displayed in the user interface corresponds to NSM4000 server time, but is mapped to the local time zone of your client computer.

    The default system clock for an NSM4000 appliance might not be precise enough for some networks. To ensure time synchronization across all nodes in the fabric, we strongly recommend that you use the following guidelines:

    • Add an NTP server to the first virtual appliance during initial setup.
    • For each additional appliance, add the same NTP server that you specified for the first appliance.

      Note: You must add the NTP server before you add the first node to the fabric from the user interface.

    Published: 2014-10-30