NetModule NB3711, User Manual

Page: 40 / 214

NB3711 User Manual 4.0
Supervision
Network outage detection on a per-link basis 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.
Figure 5.5.: Link Supervision
Parameter Supervision Settings
Link The WAN link to be monitored (can be ANY)
Mode Specifies whether the link shall only be monitored if being
up (e.g. for using a VPN tunnel) or if connectivity shall be
also validated at connection establishment (default)
Primary host The primary host to be monitored
Secondary host The secondary host to 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)
40