code: def enable_gpid(self):
          
          if self.is_ncb:
              self.run_lldptool(["-T", "-i", self.port_name, "-g", "ncb",
                                 "-V", "evb", "-c", "evbgpid=yes"])
              return True
          else:
              LOG.error("GPID cannot be set on NB")
              return False
docs: Function to enable Group ID on the interface.
  
          This is needed to use the MAC, GID, VID Filter.