You can hot-swap WAN modules. This means you can add or remove a WAN module in the Branch Gateway while the system is running, but the Branch Gateway resets when you add or remove the module. However, hot insertion and removal is not recommended in most cases. Because hot insertion or removal resets the Branch Gateway, any translation and other data that is in the running configuration but has not been saved to the startup configuration will be lost.

There is no configuration necessary when you add or remove a WAN module. Configuration is only necessary when you add WAN lines to the new module. See Adding a WAN line.