This comes as a big surprise to me ..
Likes me too but not in the expected way! 
And if you will have a look into a white paper from Tilera according to
the TileGx platform you will think it must be a dream what this hardware is able to do.
Tilera TileGx White Paper
Is this a bug or design fail? Will it get fixed? When?
In normal there should nothing be wrong with GRE as I was seeing here
in the RFC 2784
First I was thinking that only me is urgent needing many different vpn
methods and abilities and I was setting up a poll for that and the response
give me the feedback I am not alone with this wishes. VPN Poll