1) Jumbo frames are not intended for HOME networks. Doing this will degrade NAT performance, as the NAT will have more fragmenting to do.
2) The switch can handle 9K frames.
3) The NAT can only handle 4K frames.
In the end you will NOT see increased LAN performance by using jumbo frames, as the IPOS is designed to handle a frame size of 1500.
Stay away from jumbo frames, it's intended for CORE network switches.