Virtual Routing and Forwarding (Lite)

modulename: vrf.ko

configname: CONFIG_NET_VRF

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Virtual Routing and Forwarding (Lite)
In linux kernel since version 4.1 (release Date: 2015-06-21)  
This option enables the support for mapping interfaces into VRF's. The
support enables VRF devices.

source code:
drivers/net/vrf.c