code: def create(self, vrf_name, rd=None):
          
          commands = ['vrf definition %s' % vrf_name]
          if rd:
              commands.append('rd %s' % rd)
          return self.configure(commands)
docs: Creates a new VRF resource
  
          Note: A valid RD has the following format admin_ID:local_assignment.
              The admin_ID can be an AS number or globally assigned IPv4 address.
              The local_assignment can be an integer between 0-65,535 if the
              admin_ID is an IPv4 address and can be between 0-4,294,967,295 if
              the admin_ID is an AS number. If the admin_ID is an AS number the
              local_assignment could also be in the form of an IPv4 address.
  
          Args:
              vrf_name (str): The VRF name to create
              rd (str): The value to configure the vrf rd
  
          Returns:
              True if create was successful otherwise False