I’ve been trying the kernel out using the following command to upload the kernel:
flasher -l -b -k zImage-su-18-200730
And powering on the device, the mip6 kernel gets loaded (until the next reboot). Once it boots, its possible to copy mip6d onto the n770, as it appears as a USB storage device. Install X-Term, write a mip6d configure script, and off you go (I’ve not tested with IPsec yet though)!
I remain unconvinced about the usefulness of the n770/n800 type devices. They may be usefule for some remote control applications, although I’m not sure, more testing (using IPv6) is needed ;).