The documentation on Ethernet is somewhat lacking, so I'm putting together this page as a reference for getting started quickly with Ethernet. You'll want to download my EthernetTester, which uses DHCP and serves a sample web page, as well diagnostic LEDs and output over serial. EthernetTester Rolf's page is a good reference: http://mbed.org/users/rolf/notebook/ethernet/ Much of this page is from