User's Manual

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¾ Setting the System Clock Manually
To set the date and time, enter the following command in privileged mode:
clock set <year><month><date><hour><minutes><seconds>
To set the time zone and daylight savings time adjustment, enter the following com-
mands in configure mode:
clock timezone<WORD><-23 - 23>
clock summer-time <zone> [recurring]
<1-4><start day><start month><hh:mm>
first<start day><start month><hh:mm>
last<start day><start month><hh:mm>
<1-4><end day><end month><hh:mm>
first<end day><end month><hh:mm>
last<end day><end month><hh:mm>
[<-23 - 23>]
¾ Setting the System Clock with NTP
You can use NTP (Network Time Protocol) to synchronize JadeOS to a central time
source.
3.8.5 Clock Synchronization
For each NTP server, you can optionally specify the NTP iburst mode for faster clock
synchronization. The iburst mode sends up ten queries within the first minute to the
NTP server. (When iburst mode is not enabled, only one query is sent within the first
minute to the NTP server.) After the first minute, the iburst mode typically synchro-
nizes the clock so that queries need to be sent at intervals of 64 seconds or more.
You can add a NTP server using the following command:
ntp server <ipaddr> [iburst]
3.8.6 Configuring NTP Authentication
The NTP adds security to an NTP client by authenticating the server before synchro-
nizing the local clock. NTP authentication works by using a symmetric key which is
configured by the user. The secret key is shared by both JadeOS and an external NTP
server. This helps identify secure servers from fraudulent servers.
This example enables NTP authentication, add authentication secret keys into the da-
tabase, and specifies a subset of keys which are trusted. It also enables the iburst op-
tion.
(JadeOS)(config)#ntp authenticate
(JadeOS)(config)#ntp authentication-key <key-id> md5 <key-secret>