EndRun Meridian II, Руководство пользователя

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M e r i d i a n I I U s e r M a n u a l 78
C H A P T E R S E V E N
79 M e r i d i a n I I U s e r M a n u a l
N E T W O R K T I M E P R O T O C O L ( N T P )
This line tells
ntpd
to use the NTP server at address 192.168.1.120 in addition to any other servers
which might also be configured in the client’s
ntp.conf
file.
Restart
ntpd
to have it begin using Meridian II. Use the NTP utility
ntpq
to check that
ntpd
is able
to communicate with Meridian II. After issuing the command
ntpq
you will see the
ntpq
command prompt:
ntpq>
Use the command
peers
to display the NTP peers which your computer is using. One of them should be the Meridian II
server which you have just configured. You should verify that it is being ‘reached’. (You may have
to continue issuing the peers command for a minute or two before you will see the ‘reach’ count
increment.) If you have other peers configured, verify that the offset information for the Meridian II
server peer and your other peers is in agreement to within a few milliseconds, assuming that the other
peers are synchronized to that level of accuracy.
It may also be useful to start the NTP daemon in ‘debug’ mode (
ntpd -d
) to confirm successful con-
figuration. Refer to the NTP documentation for detailed usage of these debug utilities.
Unix-like Platforms: MD5 Authenticated NTP Client Setup
MD5 authenticated setup is relatively simple, if:
• You have been able to successfully communicate with Meridian II on your network.
• Your Meridian II has been configured to perform authentication either by factory default, or by
running the
ntpconfig
shell script. The example Meridian II authentication configuration shown
in
Configuring NTP Using the Network Interface or Serial Port
above, will be assumed in the ex-
ample configuration commands shown here.
• You have installed NTP on your client computer.
• You have successfully performed the Unix-like Platforms: Basic NTP Client Setup on your client
computer.
Create the ntp.keys File
You must create a file named
ntp.keys
in the
/etc
directory. It must be a copy of the one residing in
the /etc directory of your Meridian II. You can
telnet
into your Meridian II and start an
ftp
ses-
sion with your client computer to send the Meridian II’s
/etc/ntp.keys
file to your client computer,
use the secure copy utility
scp
, or you can just use a text editor on your client computer to create an
equivalent file.