Digi LR54 User Manual page 561

Virtual Private Networks (VPN)
4. Create a new PPP-over-L2TP access concatenator or select an existing one:
To create a new L2TP access concatenator , see
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To edit an existing L2TP access concatenator , click to expand the appropriate tunnel.
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5. After creating or selecting the PPP-over-L2TP access concatenator, click Active recovery.
6. Enable active recovery.
7. For Restart interface, enable to configure the device to restart the interface when its
connection is considered to have failed. This is useful for interfaces that may regain
connectivity after restarting, such as a cellular modem.
8. For Reboot device, enable to instruct the device to reboot when the WAN connection is
considered to have failed.
9. Change the Interval between connectivity tests.
Allowed values are any number of weeks, days, hours, minutes, or seconds, and take the
format number{w|d|h|m|s}.
For example, to set Interval to ten minutes, enter 10m or 600s.
The default is 15 minutes.
10. For Success condition, determine whether the interface should fail over based on the failure
of one of the test targets, or all of the test targets.
11. For Attempts, type the number of probe attempts before the WAN is considered to have failed.
12. For Response timeout, type the amount of time that the device should wait for a response to
a probe attempt before considering it to have failed.
Allowed values are any number of weeks, days, hours, minutes, or seconds, and take the
format number{w|d|h|m|s}.
For example, to set Response timeout to ten minutes, enter 10m or 600s.
The default is 15 seconds.
LR54 User Guide
Configure a PPP-over-L2TP
L2TP
tunnel.
561