nPath routing in L3 setup

Hi,

We like to setup a configuration with use of nPath routing (Direct Server Return). Client , server and BIG-IP are connected on different interfaces of the same layer3 router. Just like the "Layer 3 nPath routing example" described in document https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/ltm-implementations-11-1-0/6.html The poolmember server is Windows 2008 and cannot deal with IPIP of GRE tunnels as described in the document.

Is there an alternative perhaps that I overlooked?

regards, DevP.