The rfc1583 compatible command converts rules defined in RFC 5340 into rules defined in RFC 1583.
The undo rfc1583 compatible command converts rules defined in RFC 1583 into rules defined in RFC 5340.
By default, OSPFv3 supports the routing rule of RFC 5340.
RFC 5340 and RFC 1583 define different OSPFv3 route selection rules. When enabling OSPFv3, configure the same route selection rules on all devices in the same OSPFv3 area. For example, an OSPFv3 device supports route selection rules defined in RFC 5340 by default. If the other routers in the same OSPFv3 area support route selection rules defined in RFC 1583, run the rfc1583 compatible command.