Interfaces Wide Area Networks (WANs)
Digi Connect IT® 4 User Guide
62
a. On the menu, click System. Under Configuration, click Device Configuration.
The Configuration window is displayed.
3. Click Network > Interfaces.
4. Create a new WAN or WWAN or select an existing one:
n To create a new WAN or WWAN, see Configure a Wide Area Network (WAN) or Configure
a Wireless Wide Area Network (WWAN).
n To edit an existing WAN or WWAN, click to expand the appropriate WAN or WWAN.
5. After creating or selecting the WAN or WWAN, click SureLink.
By default, SureLink is enabled for the preconfigured WAN (WAN) and WWAN (Modem). The
default configuration tests the DNS servers configured for the interface.
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 Configure a Wireless Wide Area Network (WWAN) for details about SIM
failover.
6. (Optional) Change the Test 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.
7. (Optional) If more than one test target is configured, for Success condition, select either:
n One test passes: Only one test needs to pass for Surelink to consider an interface to be
up.
n All test pass: All tests need to pass for SureLink to consider the interface to be up.
8. (Optional) For Pass threshold, type or select the number of times that the test must pass
after failure, before the interface is determined to be working and is reinstated.
9. (Optional) For Response timeout, type the amount of time that the device should wait for a
response to a test attempt before considering it to have failed.
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