code: def set_interface(self, vrf_name, interface, default=False, disable=False):
          
          cmds = ['interface %s' % interface]
          cmds.append(self.command_builder('vrf forwarding', value=vrf_name,
                                           default=default, disable=disable))
          return self.configure(cmds)
docs: Adds a VRF to an interface
  
          Notes:
              Requires interface to be in routed mode. Must apply ip address
              after VRF has been applied. This feature can also be accessed
              through the interfaces api.
  
          Args:
              vrf_name (str): The VRF name to configure
              interface (str): The interface to add the VRF too
              default (bool): Set interface VRF forwarding to default
              disable (bool): Negate interface VRF forwarding
  
          Returns:
              True if the operation was successful otherwise False