I found something more in my work bookmarks: http://www.atmel.com/Images/Atmel-42233-Using-the-lwIP-Network-Stack_AP-Note_AT04055.pdf http://www.atmel.com/Image

I found something more in my work bookmarks: http://www.atmel.com/Images/Atmel-42233-Using-the-lwIP-Network-Stack_AP-Note_AT04055.pdf http://www.atmel.com/Images/Atmel-42233-Using-the-lwIP-Netwo... Maybe it also has some extra information which can help.