Digi TransPort WR31 User Manual page 205

Configure network interfaces
Advanced Mobile Network Settings parameters
Metric:
The connected metric of the mobile interface. The default metric of a connected interface is 1.
By allowing the interface to have a higher value (lower priority), static routes can take
preference to interfaces. For normal operation, leave this value unchanged.
Generate Heartbeats on this interface
Heartbeat packets are UDP packets that contain status information about the router that you
can use to locate a remote unit's current dynamic IP address. When enabled, displays the
following parameters:
Send Heartbeat messages to IP address a.b.c.d every h hrs m mins s secs
If these parameters are set to a non-zero value, the router will transmit heartbeat packets to the
specified IP address/hostname at the specified interval.
Use interface x,y for the source IP address
Allows the selection of the source interface for the UDP heartbeats. For example, it may be
required to send the heartbeat packets down a VPN tunnel. And in order to match the
corresponding subnets of the VPN, it might require changing the source IP to match an inside
Ethernet interface.
For normal operation, using the mobile interface as the source IP address, leave this value
unchanged.
Select transmit interface using the routing table
When enabled, the UDP heartbeats chooses the best route from the routing table. If disabled the
exit interface will be interface on which the heartbeat is configured.
Include IMSI information in the Heartbeat message
When enabled, the heartbeat includes the IMSI of the wireless module.
Include GPS information in the Heartbeat message
When enabled, the heartbeat includes the GPS co-ordinates of the router.
Digi TransPort WR Routers User Guide
Configure mobile (cellular) interfaces
205