Currently there is no possibility to release/renew WAN interface DHCP address in ePMP devices (AP and SMs). I haven’t even found a way to do this via CLI. You have to reboot the device for that and it only does renew, not release. Please include a button in GUI or at least a command in CLI to do that.
Seems a pretty simple thing to implement Cambium. Having to reboot the radio is just crazy!