NTP Time Source for a Junos Space Appliance
This topic applies to the following Junos Space Appliances: JA1500 and JA2500.
To ensure consistent behavior among all nodes in a multinode fabric, each node time must be synchronized with every other node in the fabric. When you configure a Junos Space Appliance with a Network Time Protocol (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. The additional nodes installed on the same fabric automatically get their time setting from the first node in the fabric.
For more information about the Junos Space fabric, refer to the Managing Nodes in the Junos Space Fabric chapter in the Junos Space Network Management Platform Workspaces Feature Guide (available at http://www.juniper.net/documentation/en_US/release-independent/junos-space/index.html).
By default, Junos Space Network Management Platform synchronizes the time zone of the client computer with that of the Junos Space server. Hence, the time displayed on the Web user interface corresponds to the time zone configured on the Junos Space server. However, the Junos Space CLI displays the time corresponding to the time zone configured in the Junos Space server.
To ensure time synchronization across all nodes in the fabric, we strongly recommend that you use the following guidelines:
Add an NTP server when you configure the first Junos Space node in the fabric.
For each additional node that you add to the fabric, configure the same NTP server that you specified for the first appliance.
You must add the NTP server before you add the first node to the fabric from the Junos Space Network Management Platform Web user interface.