cDVR User Guide, Release 2.0
137
System Configuration - SNMP Tree
Server
Restart
Branch
The
Server Restart
branch allows you to restart the NTP service on the RM.
To access and use the
Server Restart
menu, proceed as follows:
1.
From the
System
tab, click on the triangle next to the
NTP
branch to expand out one level.
2.
Click the
Server Restart
entry to open the
NTP
restart
window.
3.
Click the execute (
)
icon to open the
Execute NTP restart
window:
4.
Click
Submit
to execute the restart immediately.
SNMP
Tree
The SNMP tree allows you to configure settings for the RM’s Simple Network Management Protocol
(SNMP) service. When SNMP is enabled, all events that are shown in the GUI’s
Dashboard > Events
st
Displays the accuracy of time sync to the reference clock, or stratum. The lower the score,
the better. The RM should register at most at 2 or 3 in order to function effectively. If this
number is 16, the RM is not getting timing service from the server.
t
Shows the type of peer for the entry. One of the following letters will be displayed:
l = local peer
u = unicast peer
m = multicast peer
b = broadcast peer
when
Reports when the last time service packet was received (in seconds).
poll
Shows the polling interval (in seconds)
reach
Displays the octal bitmap of results from the last eight polls from the NTP server. A value of
377 means the last 8 attempts were successful. A value of 0 means the last 8 attempts failed
(i.e., timing is unavailable for this server).
delay
Displays the number of milliseconds it is taking for NTP packets to make a round-trip from the
RM to the NTP server and back to the RM. It is advisable to pick NTP servers that are
physically close to the RM.
offset
Display the number of milliseconds difference between the NTP server clock and the RM’s
clock
jitter
Also known as dispersion. Displays the dispersion in milliseconds of successive time values
from the NTP server. Jitter is a measure of the network’s stability (in terms of time) from the
RM to the NTP server. It is an important factor used by NTP to determine the “best” server.
Table 38.
Server State menu descriptions
Name
Description
