IPIP-tunnel with 1500 MTU

I would like to tunnel IP packets over an IP network, and this IP network has 1500 MTU (regular ethernet MTU). In the cisco tunnel (and most others) the tunnel MTU ends up being 1450-something bytes. This is not acceptable, I need something that is able to split the packet up into two packets so that the tunnel MTU will be 1500. Does anyone know of a product that does this? I do not want any kind of unix/pc solution, everything that consists of PC hardware or has a harddrive is by default ruled out. -- Mikael Abrahamsson email: swmike@swm.pp.se