Link Supervision - NetModule NB1600 User Manual

Supervision
Network outage detection can be performed by sending pings on each link to some
authoritative hosts. A link will be declared as down in case all trials have failed and
only as up if at least one host can be reached.
Administrative status: Enable or disable link supervision
Primary host: The primary host which will be monitored
Secondary host: The secondary host which will be monitored (optional)
Ping timeout: The amount of time in milliseconds a response for a single ping can
take. Consider to increase this value in case of slow and tardy links (such as 2G
connections)
Ping interval: The interval in seconds at which pings are transmitted on each interface
Max. number of failed trials: The maximum number of failed ping trials until the ping
check will be declared as failed
You may further specify an emergency action in case no uplink can be established at
all. You can choose between rebooting the system or restarting all involved link services
after a specific maximum downtime is reached.
Emergency action: The emergency action which should be taken after max. downtime
NB1600 User Manual
Figure 5.4.: Link Supervision
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