The rfc1583 compatible command enables the routing rule of compatible RFC 1583.
The undo rfc1583 compatible command restores the default setting.
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, an OSPF device supports route selection rules defined in RFC 1583 by default. If the other FWs in the same OSPF area support route selection rules defined in RFC 2328, you need to run the undo rfc1583 compatible