Buffalo AirStation WHR-G54S User Manual page 68

Configuring a WDS Bridge
Connect a PC's Ethernet port to another RJ-45 port on the main router (the first
AirStation). You will use this PC to configure the settings of the AirStations.
Here's the whole setup, ready for initial configuration.
* Note: Each AirStation may be part of 6 different bridges. Remember that each layer
of bridges takes about half your total network speed, so avoid configuring daisy-chains
more than 4 bridges long. A star-pattern is always better, with a central router serving
multiple bridges.