code: def enable_evb(self):
          
          if self.is_ncb:
              self.run_lldptool(["-T", "-i", self.port_name, "-g", "ncb",
                                 "-V", "evb", "enableTx=yes"])
              ret = self.enable_gpid()
              return ret
          else:
              LOG.error("EVB cannot be set on NB")
              return False
docs: Function to enable EVB on the interface.