I'm in China and our new DSL broadband is a super cut-rate Huawei box that takes an optical input and has 4 LAN ports. You can set the box's 192.168.X.1, and then it expects the four LAN inputs to be static manually assigned IPs on the same range. In order to sign on you must open a PPPoE connection on a terminal. The unit does not support DHCP or PPPoE itself.
I want to set up a wireless router that can keep the PPPoE alive, but both the linksys and Volans I have can EITHER do a static IP or PPPoE connection, not both at once.
The linksys supports static IP and PPPoE passthrough, which allowed me to connect to it via wireless and then using a "broadband connection" on the desktop open up the PPPoE and get internet access, but other wireless users could not simultaneously log on AND any mobile devices were unable to use that method.
My thinking now is to go Huawei box -> Linksys (static IP & PPPoE passthrough) -> Volans (PPPoE and DHCP) but I'm leery about the kind of service quality I'll get with nested DHCP and it seems like a port-forwarding nightmare.
The alternative is to request a better modem from the provider, but as this is a 2nd tier Chinese city the odds they'll have anything better are low.