Synchronizing clock for Multiple NTP Servers

Overview

The NTP is a networking protocol used for clock synchronization. It is used to set all connecting computer systems by way of an address to a source (for example, using an address linking GMT between the systems).

According to the PeerApp Administration Guide, section Configuring Local Time:

You configure local time on the UltraBand 1000 either manually or through the use of 
a Network Time Server via NTP.

To configure local time manually

• Enter time <MMDDYYhhmm> at the configuration# CLI prompt, where  <MMDDYYhhmm> is the new date and time (two digits each for month, date, year, hours, and minutes). The date and time are set.
  Note:  the Command Line Interface configuration# prompt requires Enabled mode privileges. 

To configure local time using NTP

1. Using the Command Line Interface
   • Enter config at the enabled CLI prompt, to start the Configuration mode.
   • Enter ntp server-ip <IP address> at the CLI config prompt, where <IP address> is the IP address of the NTP server (enter <127.127.1.0> for the local server).
   • Enter ntp timezone <timezone> at the CLI config prompt, where <timezone>  is the local time zone according to its GMT offset.
     IMPORTANT: The NTP only supports the GMT (+/-) notation as a valid time zone. 
   • Apply configuration using apply.
     
     
2. Using the Configuration File 
   • Include the following lines in the file cluster_conf.xml:
     

     <ntp>
     <server-ip>1.asia.pool.ntp.org</server-ip>
     <server-ip>2.asia.pool.ntp.org</server-ip>
     <timezone>GMT+3</timezone>
     </ntp>

     Notes:
     • Follow similar steps as listed in the article Add Email Recipients for Cache Notifications to perform this change in the Configuration file.
     • This change implies a service restart, so be prepared for a quick system outage as a side effect.
     • Keep in mind that a change in the machine clock time may disrupt the graphs generation for the amount of time of the offset, i.e. one hour ahead may result in a time gap with no graphs being generated by the system.

Content Author: Erick Tovar