ExtraHop Trace Admin UI, Руководство пользователя

Страница: 47 / 58

ExtraHop 8.8 ExtraHop Trace Admin UI Guide 47
Only the selected sensors that have a firmware upgrade available appear in the Sensor Details pane.
5. Click Install Firmware .
When the upgrade completes, the Sensor Version field is updated with the new firmware version.
System Time
The System Time page displays the current configuration and the status of all configured NTP servers.
When capturing data, it is helpful to have the time on the ExtraHop appliance match the local time of the
router. The ExtraHop appliance can set time locally or synchronize time with a time server. By default,
system time is set locally, but we recommend that you change this setting and set time through a time
server.
•
Configure the system time .
• View information about the appliance settings in the System Time section:
Time Zone
Displays the currently selected time zone
System Time
Displays the current system time.
Time Servers
Displays a comma-separated list of configured time servers.
• View information for each configured NTP server in the NTP Status table:
remote
The host name or IP address of the remote NTP server you have configured to synchronize with.
st
The stratum level, 0 through 16.
t
The type of connection. This value can be
u
for unicast or manycast,
b
for broadcast or
multicast,
l
for local reference clock,
s
for symmetric peer,
A
for a manycast server,
B
for a
broadcast server, or
M
for a multicast server.
when
The last time when the server was queried for the time. The default value is seconds, or
m
is
displayed for minutes,
h
for hours, and
d
for days.
poll
How often the server is queried for the time, with a minimum of 16 seconds to a maximum of 36
hours.
reach
Value that shows the success and failure rate of communicating with the remote server. Success
means the bit is set, failure means the bit is not set.
377
is the highest value.
delay
The round trip time (RTT) of the ExtraHop appliance communicating with the remote server, in
milliseconds.
offset
Indicates how far off the ExtraHop appliance clock is from the reported time the server gave
you. The value can be positive or negative, displayed in milliseconds.
jitter
Indicates the difference, in milliseconds, between two samples.