I have started 'playing' with Cisco equipment and at the moment I am going through the ICND book. When switching into global configuration command I type my desired IP address for the switch and press enter. Instead of getting this IP address I get the error message 'invalid input detected at...' I checked the command several times of correctness, the syntax is the same as in the ICND book.
To describe the situation in more details. When starting the Switch, I turn into privileged Exec mode and then I type 'conf t'. Everything OK till here, but then I am standing in front of the problem mentioned above.
Can anybody help please,