Wide Area Networks (WANs) WAN failover
Digi TransPort WR Routers User Guide
59
To detect failover:
n The eth1 interface uses IPprobing to detect interface failure.
n The backup WANs, wan2 and wan3, use passive techniques to detect interface failure.
Using the IPprobing configured over the eth1 interface, the TransPort device sends a probe packet of
size 256 bytes to the IP host 43.66.93.111 every 10 seconds. If no responses are received for 60
seconds, the TransPort device brings the eth1 interface down and starts using the wan2 (cellular1)
interface.
If the TransPort device cannot get a connection on the wan2 (cellular1-sim1) interface, it attempts to
use the wan3 (cellular1-sim2) interface. It attempts to switch back to the wan2 (cellular1-sim1)
interface after 30 minutes (1800 seconds).
The TransPort device continues to send probes out of the eth1 interface. If it receives probe
responses for 120 seconds, it reactivates the wan1 interface and starts using it again as the primary
WAN.
To achieve this WAN failover from the eth1 to cellular1-sim1 and cellular1-sim2 interfaces, the
WANfailover configuration commands are:
digi.router> wan 1 interface eth1
digi.router> wan 1 timeout 60
digi.router> wan 1 probe-host 43.66.93.111
digi.router> wan 1 probe-interval 10
digi.router> wan 1 probe-size 256
digi.router> wan 1 activate-after 120
digi.router> wan 1 state on
digi.router> wan 2 interface cellular1-sim1
digi.router> wan 2 retry-after 1800
digi.router> wan 2 state on
digi.router> wan 3 interface cellular1-sim2
digi.router> wan 3 retry-after 1800
digi.router> wan 3 state on
digi.router> save config
SureLink probe options for cellular WANs with only one SIM
For WANs configured to use a cellular interface with only one SIM, you can configure additional probe
options to reset the cellular module and/or the router when a failure is detected:
To Next Page
Loading...
