Table of Contents
NTP Stratum 2 Server
Preface
NTP Stratum 2 Server is server that is using NTP Stratum 1 Server for as his reference time source. It is possible to interconnect more as one NTP Stratum 2 server between each other. This will provide us failover in the case that the NTP Stratum 1 server will be unavailable.
In this case we will use NTPD demon that is running on NTP Stratum 1 server as well we'll use NTPD demon running on NTP Stratum 2 Server. The whole communication will be running on 123/UDP port.
Configure NTP Stratum 2 Server
The whole configuration of NTPD is stored in “ /etc/ntp.conf “ file. To configure it, just insert list of your NTP Stratum 1 servers in the format:
“server <IP_or_FQDN> “
[root@NTP-Stratum-2 ~]# cat /etc/ntp.conf | grep server server 10.0.12.13
Status of NTP Stratum 2 Server
To check the status of any accessible NTPD demon you can use on your NTP Client site the application “ ntpq “
[root@NTP-Stratum-2 ~]# ntpq -p remote refid st t when poll reach delay offset jitter ============================================================================== 10.0.12.13 .GPS. 0 l 21 64 377 0.000 0.013 0.020