Does Cisco GW has GUI? same as Laird GW's? can we configure it as a packet forwarder or a server?
can we add sensors on it? how does it work?
If by GW, you mean Gateway, then yes. Cisco switches, routers and gateways can now have GUI, although it might depend on the model.
Here's an example: https://www.cisco.com/c/en/us/td/docs/cable/rf_gateway/feature/guide/rfgw10_gui.html
According to the Release Notes for the Cisco LoRaWAN Gateway, Release 184.108.40.206, they added support for Common Packet Forwarder (CPF).
As far as adding sensors, please see this discussion: How to deploy LoRaWAN gateway and sensor?
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