def _get_undefined_tlv(self):
return self.__undefined_tlv<EOL>
Getter method for undefined_tlv, mapped from YANG variable /network_instances/network_instance/protocols/protocol/isis/levels/level/link_state_database/lsp/undefined_tlvs/undefined_tlv (list)

    YANG Description: List of TLVs that are not defined within the model, or are not
recognised by the system.