100MBit .... not with this device. Linksys has a router with same chipset and also says it won't do more than 20MBit. (I also tested the WAN port and 20MBit is the max). You will need to go for a more "professional" router, like Netgears FVX538 or FVS338. They (as described by manufacturer) can reach 92MBit. I'm sure there are more and better products out there but these are the ones I know of without searching