How to set up the WRT54G as a switch/bridge.

Connect a computer to the WRT54G and use a web browser to log in to it. (Device default IP address 192.168.1.1. Default user name blank and password "admin". ) Change the configuration of the WRT54G as follows:

1. Under Settings/Basic Settings, turn the DHCP server off. CLICK THE Save Settings BUTTON.
2. Under Settings/Advanced Routing, change the Operating Mode from Gateway to Router. CLICK THE Save Settings BUTTON.

Plug the ethernet cable from/to the upstream router into one of the numbered jacks, NOT the Internet jack. Change the IP of the WRT54G to a IP within your LAN's IP range. Reboot everything.