code: def _parse_nexus_vni_range(self, tunnel_range):
          
          for ident in tunnel_range:
              if not self._is_valid_nexus_vni(ident):
                  raise exc.NetworkTunnelRangeError(
                      tunnel_range=tunnel_range,
                      error=_("%(id)s is not a valid Nexus VNI value.") %
                      {'id': ident})
  
          if tunnel_range[1] < tunnel_range[0]:
              raise exc.NetworkTunnelRangeError(
                  tunnel_range=tunnel_range,
                  error=_("End of tunnel range is less than start of "
                          "tunnel range."))
docs: Raise an exception for invalid tunnel range or malformed range.