Digi Connect IT 4 User Manual page 84

Interfaces
When SureLink is configured for Wireless WANs, SureLink tests are only run if the cellular
modem is connected and has an IP address. Use the SIM failover options to configure the
Connect IT 4 device to automatically recover the modem in the event that it cannot obtain an
IP address. See
failover.
(config network interface my_wan)> surelink enable true
(config network interface my_wan)>
5. By default, the Test DNS servers configured for this interface test is automatically
configured and enabled. This tests communication with DNS servers that are either provided
by DHCP, or statically configured for this interface.
To add additional tests:
a. Add a test:
(config network interface my_wan)> add surelink tests end
(config network interface my_wan surelink tests 1)>
b. New tests are enabled by default. To disable:
(config network interface my_wan surelink tests 1)> enable false
(config network interface my_wan surelink tests 1)>
c. Create a label for the test:
(config network interface my_wan surelink tests 1)> label string
(config network interface my_wan surelink tests 1)>
d. if the test should apply to both IPv6 rather than IPv4, enable IPv6:
(config network interface my_wan surelink tests 1)> ipv6 true
(config network interface my_wan surelink tests 1)>
e. Set the test type:
(config network interface my_wan surelink tests 1)> test value
(config network interface my_wan surelink tests 1)>
where value is one of:
n
Digi Connect IT® 4 User Guide
Configure a Wireless Wide Area Network (WWAN)
ping: Uses ICMP to determine connectivity.
If ping is selected, complete the following:
Set the ping_method:
l
(config network interface my_wan surelink tests 1)> ping_method
value
(config network interface my_wan surelink tests 1)>
where value is one of:
Wide Area Networks (WANs)
for details about SIM
84