[dev] vrf-lite support in linux

Hi, I am trying out the vrf-lite ( https://www.kernel.org/doc/Documentation/networking/vrf.txt) on ubuntu 16.04.1 (kernel version 4.15). I am able to try it out on virtual box vm. When I try to do the same on Ubuntu 16.04 image on AWS marketplace, adding vrf-lite through ip link command doesn't work. Seems like its not supported. Anyone tried it? TIA Himanshu