code: def get_remote_chassis_id_mac(self, tlv_data):
          
          ret, parsed_val = self._check_common_tlv_format(
              tlv_data, "MAC:", "Chassis ID TLV")
          if not ret:
              return None
          mac = parsed_val[1].split('\n')
          return mac[0].strip()
docs: Returns Remote Chassis ID MAC from the TLV.