EndRun Sonoma D12 - PTP Operation

S o n o m a U s e r M a n u a l
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C H A P T E R T H R E E
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S o n o m a 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 )
Mask Alarm
In Stratum 1 operation an alarm will be indicated when there is a loss of signal. For Stratum 2 opera-
tion you may not want to see this alarm. You can mask it (prevent it from showing) by using the
console port (serial/network) command setsigfltmask. Or, on the front-panel keypad/display go
to the Faults submenu. Look for SigFltMask and set it appropriately.
Setting Up NTP Clients on
Unix-like Platforms
To congure your Unix-like computer to use your Sonoma Time Server, you must have success-
fully completed the NTP Server basic installation procedure described above. It is expected that you
are, or have access to, a capable Unix/Linux system administrator and know more than a little about
installing distributions from source code. Installation must be performed by a user with root privi-
ledges on the system.
If you have access to a usenet news server, many problems may be solved by the helpful people who
participate in the Internet news group devoted to NTP at comp.protocols.time.ntp.
Three methods of using the Sonoma with NTP clients on Unix-like platforms will be described:
Basic: This is the simplest, and will operate without MD5 authentication. NTP beginners should
always perform this setup rst.
MD5: This method is trickier only because MD5 keys must be set up and distributed accurately to
the NTP clients in a secure way. The Sonoma is factory congured to authenticate its replies to NTP
MD5 clients using its default set of keys.
Broadcast/Multicast: This method simplies conguration of the clients on large networks since
specic server addresses need not be congured in each client’s /etc/ntp.conf le. It can be cong-
ured either with or without MD5 authentication. However, it is highly recommended that authentica-
tion be congured when using broadcast/multicast mode due to the relative ease with which a fake
NTP server can take over the clock setting of the broadcast/multicast clients on the network.
Unix-like Platforms: Basic NTP Client Setup
Basic setup is relatively simple, if:
• You have been able to successfully communicate with the Sonoma on your network.
• You have installed NTP on your client computer.
Configure NTP
You must edit the ntp.conf le which ntpd, the NTP daemon, looks for by default in the the /etc
directory. Add this line to the ntp.conf le:
server 192.168.1.120