A question on setting IP addresses for modems, routers and switches. I have a 3com modem which has the default 192.168.1.1, sub net mask at 255.255.255.0 and the dhcp range as 192.168.1.2 to 192.168.1.254. The cisco router is on default 192.168.0.1, subnet to 255.255.255.0 and dhcp range 192.168.0.100 to 192.168.0.150.
I am now attaching a switch switch which is also a default IP address of 192.168.1.1 and so I can't get into its control screen to change the settings as the 3com panel comes up at that address. I obviously need to change the IP address of the 3Com but I'm not sure what numbers I can use and whether I would also need to change the sub net mask and the dhcp range - my first attempt led me to having to reset the 3com back to factory after locking myself out so appreciate any help with this and / or a good reference to how addressing works on a home style LAN.