Carrier Smart Select; Load Balancing - Digi 6350-SR User Manual

Dual WAN configurations

Carrier Smart Select

Note If one of the SIM cards requires a custom or unique APN, you will need to add this APN into the
Digi 6350-SR/6355-SR config under the Modem > APN option.
By default, the Digi 6350-SR/6355-SR plug-in modem is set up for automatic SIM selection. That is, if
the Digi 6350-SR/6355-SR is unable to connect with the SIM in slot 1, after a specified number of
failures (5 by default) the Digi 6350-SR/6355-SR will automatically switch to use the SIM in slot 2. For
this setup, you will need two SIM cards enabled, provisioned, and installed in the plug-in modem's SIM
slots. The two cards can be from the same carrier or from different carriers.

Load balancing

Traffic can be balanced between the Ethernet and Cellular WAN interfaces. This feature, often
referred to as load balancing, uses an interface's Weight value -- this is defined under the IPv4
expandable menu. The interfaces being balanced must share the same Metric value.
Digi 6350-SR/6355-SR LTE Router User Guide
Carrier Smart Select
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