Alcatel-Lucent OmniSwitch 6450 Management Manual page 127

Configuring Network Time Protocol (NTP)
Setting the Version Number
There are currently four versions of NTP available (numbered one through four). The version that the NTP
server uses must be specified on the client side.
To specify the NTP version on the server from which the switch receives updates, use the
command with the server IP address (or domain name), version keyword, and version number, as shown:
-> ntp server 1.1.1.1 version 3
The default setting is version 4.
Marking a Server as Preferred
If a client receives timestamp updates from more than one server, it is possible to mark one of the servers
as the preferred server. A preferred server's timestamp is used before another unpreferred server times-
tamp.
To specify an NTP as preferred, use the
and the prefer keyword, as shown:
-> ntp server 1.1.1.1 prefer
OmniSwitch 6250/6450 Switch Management Guide
ntp server command with the server IP address (or domain name)
June 2013
Configuring NTP
ntp server
page 4-11