You could also have changed the subnet mask from what i think you must have had 255.255.255.0 to 255.255.252.0 (or for using the cidr notation /22). The latter spans, in your case, addresses 192.168.0.0 through 192.168.3.255. The mask 255.255.255.0 only spans / can only reach / can only talk to 256 addresses, and they also need to be within, for your case, 192.168.1.0 through 192.168.1.255 range. This isnt a conflict per se but how all Ethernet works. The subnet mask gives range with which devices can reach each other. Thus, also follows that if you have more than 256 devices (really only 254 because 0 and 255 are for "special puposes") you need to increase the mssk from the "most basic" 255.255.255.0 to something larger.