t_admin_time_ntp

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Updated:November 29, 2020

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Setting Device Time

Setting Device Time

You can configure the time on the device manually so that all end points connected to the device can synchronize time, based on your device's time settings.

  1. Choose Administration > Time.
  2. Set the date and the time for your device.
  3. Choose a time zone. By default, Coordinated Universal Time (UTC) is chosen.
  4. Enter the hours and minutes by which the UTC time should be offset. A time offset indicates the time that is added to or subtracted from the UTC, to arrive at the current civil time.
  5. Click Save & Apply to Device.

NTP

ClosedAbout NTP

An NTP network usually gets its time from an authoritative time source such as a radio clock or an atomic clock attached to a time server. NTP then distributes this time across the network. NTP is extremely efficient; no more than one packet per minute is necessary to synchronize two machines to the accuracy of within a millisecond of one another.

NTP uses the concept of a stratum to describe how many NTP hops away a machine is from an authoritative time source. A stratum 1 time server typically has an authoritative time source (such as a radio or atomic clock, or a Global Positioning System (GPS) time source) directly attached, a stratum 2 time server receives its time via NTP from a stratum 1 time server, and so on.

The communication between devices running NTP (known as associations) is usually statically configured. Each device is given the IP address of devices with which it should form associations. NTP messages are exchanged between each pair of devices with an association, to ensure accurate timekeeping.

 

Adding NTP Servers

  1. In the NTP Server section on the Administration > Time page, click Add.
  2. Enter the host name.
  3. Check the Prefer check box.
  4. Choose the appropriate IP address format for DNS resolution.
  5. To enable virtual route forwarding, check the VRF check box and then choose the required VRF name.
  6. Choose the source address.
  7. Click Apply to Device.

 

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