UM-00006 v1.1
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NTC-8000 – M2M Multi-Port Network Gateway
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System Monitor
The system monitor is a feature which monitors the gateway for anomalies and restarts the gateway if an anomaly occurs
preventing its normal operation. When configured, the system monitor transmits controlled ping packets to 1 or 2 user specified IP
addresses to confirm an active connection. If the system monitor does not receive responses to the pings after a specified number
of failures, it reboots the device in a last resort attempt to restore connectivity.
Figure 56 - System Monitor Settings
This system monitor works as follows:
a)
The gateway sends 3 consecutive pings to the first destination address at the interval specified in the Periodic Ping Timer
field.
b)
If all 3 pings to the first destination address fail, the gateway sends 3 consecutive pings to the second destination address
at the Periodic Ping Timer interval.
c)
If all 3 pings to the second destination address fail, the gateway sends 3 pings to the first destination address using the
Periodic Ping Accelerated Timer interval.
d)
If all 3 accelerated pings to the first destination address fail, the gateway sends 3 pings to the second destination address
at the Periodic Ping Accelerated Timer interval.
e)
If all 3 accelerated pings to the second destination address fail, the gateway registers this as a fail and returns to step C.
f)
When the number of failures reaches the number configured in the Fail Count field, the gateway reboots. If any ping
succeeds, the gateway returns to step A and does not reboot.
Note: The Periodic Ping Timer should not be set to a value of less than 300 seconds to allow the gateway time to reconnect
to the cellular network following a reboot.
Note: The traffic generated by the periodic ping feature is counted as chargeable usage, please keep this in mind when
selecting how often to ping.
Disabling the System Monitor
To disable the System Monitor set Fail Count to 0.
Configuring a Periodic Reboot
The gateway can be configured to automatically reboot after a period of time specified in minutes. While this is not necessary, it
does ensure that in the case of remote installations, the gateway will reboot if some anomaly occurs.
1.
In the Force reboot every field, enter the time in minutes between forced reboots. The default value is 0 which disables the
Periodic reboot function. The minimum period between reboots is 5 minutes while the maximum value is 65535 minutes.
2.
Click the Save button to save the settings.
