The rfc1583 compatible command converts rules defined in RFC 2328 into rules defined in RFC 1583.
The undo rfc1583 compatible command converts rules defined in RFC 1583 into rules defined in RFC 2328.
By default, OSPF supports the routing rule of RFC 1583.
RFC 2328 and RFC 1583 define different OSPF route selection rules. When enabling OSPF, configure the same route selection rules on all devices in the same OSPF area. For example, in scenarios where an OSPF device uses the default route selection rules defined in RFC 1583, if the other switches in the same OSPF area use route selection rules defined in RFC 2328, you need to run the undo rfc1583 compatible command.