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Options List
NTP Terms
NTP
: reveals that it is either running or stopped.
Root Dispersion
: (or dispersion) represents the maximum error of the local clock relative to the
reference clock.
Offset
: (or clock offset) represents the amount to adjust the local clock to bring it into correspondence
with the reference clock.
Frequency
: frequency offset (PPM) relative to hardware clock.
System Jitter
: is defined as the root-mean-square (RMS) average of the most recent offset differences,
and it represents the nominal error in estimating the offset (of the system).
Clock Jitter
: is defined as the root-mean-square (RMS) average of the most recent offset differences,
and it represents the nominal error in estimating the offset (of the clock).
Clock wander
: is the RMS of exponentially weighted frequency differences. This is not used directly,
but can, along with the jitter, be a highly useful monitoring and debugging tool.
Stratum
: the level of each server in the hierarchy is defined by a stratum number. Primary servers
are assigned stratum one.
NTP Configure
To configure NTP follow these instructions. Use the cursor keys to select NTP, then Configure and press
ENTER. Figure B.36 illustrates the NTP configuration page. Choices for the NTP Version include Versions
1, 2, 3 and 4. Multicast and Broadcast addresses may be typed in the assigned boxes.
Computer Name -- ssh clockoption@(IP address) -- 80x24
Time Protocol Server
ARBITER
SYSTEMS
[ NTP ]
PTP
SNMP
Clock
Network
System
Support
Logout
Status [ Configure ] Authentication
NTP Version
Multicast Address
Broadcast Address
Ethernet Port 1
Ethernet Port 2
[4]
[ ]
[ ]
[ ]
Apply Reset
Figure B.36: NTP Configure Page Using SSH