def enable_evb(self):
        """Function to enable EVB on the interface. """
        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
Function to enable EVB on the interface.