Configuration Screens | Configuring the |
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Field/Button | Description |
Enable SNTP | Click this checkbox to enable SNTP, the device will automatically |
| obtain current time from a SNTP server on the network. You must |
| Apply and Restart before this change will become effective. SNTP is |
| disabled by default. |
Time Zone Configuration |
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Time Zone | Use this panel to select the time zone where the |
| located. This is necessary for the device to correctly calculate local |
| time based on the UTC time received from NTP server(s). Daylight |
| saving time is automatically calculated based on your time zone |
| choice. The default time zone is Arizona (GMT - 07:00). |
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NTP server(s) provided by DHCP | If DHCP is enabled and the |
| information from it, the first two NTP servers are displayed here and |
| are available for time synchronization. |
Search NTP servers in this order | Use this panel to define the preferred search order for NTP servers. |
| Servers are contacted in the order you select. The default search |
| order is DHCP first, then |
| There are two choices: |
| • Try to connect to DHCP provided NTP servers first, then statically- |
| configured servers. |
| • Try to connect to |
| provided servers. |
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Static Configuration for NTP | You have the option of configuring up to two NTP servers |
Servers | and an alternate. The value entered can be an IP address or a |
| domain name. |
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Time Synchronization Interval |
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Interval (hours) | Time is synchronized on |
| interval configured you specify in this panel. The interval is specified |
| in hours, from 1 through 24, with 24 being the default. Time |
| synchronization can be requested whenever necessary by clicking |
| Synchronize Now. This button is only present if you have enabled |
| SNTP and restarted the device. A message displays to inform you |
| that the time synchronization process can take up to 40 seconds as a |
| valid NTP server is contacted. The result (failure or success) is |
| displayed on this page. An SNMP trap is generated when |
| time synchronization fails. After that, a failed synchronization attempt |
| generates an event with no SNMP trap. If successful, the new time is |
| also displayed. A successful manual synchronization resets the |
| synchronization interval. In other words, the countdown until next |
| synchronization is reset to zero at the time you click Synchronize |
| Now. If you are using a SNMP manager to set time synchronization, |
| set your SNMP manager timeout to be at least 45 seconds to allow |
| adequate time for this operation to take place. Time will be |
| synchronized with the first server that successfully responds to the |
| request. An event is recorded stating that time has been successfully |
| synchronized, including the IP address of the NTP server that |
| responded to the time request. |
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NOTE: Click Save and Continue or Apply and Restart as appropriate. Keep in mind that your changes are not written to persistent memory until you click Apply and Restart.
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