[U-Boot] Use of Netconsole

Hi all, I had read somewhere that if, while using netconsole, we dont set ncip, the messages are broadcast. In that case, if I send commands to my processor from my Linux host, since ncip is not set, will the processor accept them? If not, what am I supposed to do?

My requirement is that, when I press a particular switch on my board, the console should get transferred to netconsole, but the ncip should not be pre-decided