As long as it is enabled on either end of a link, either type of cable can be used. For auto MDI-X to operate correctly, the data rate and duplex setting on the interface must be set to auto. Auto MDI-X was developed by Hewlett-Packard engineers Daniel Joseph Dove and Bruce W. Melvin.A pseudo-random-number generator determines whether a network port will start in MDI or MDI-X configuration to begin auto-negotiating the link.

When two auto-MDI-X ports are connected together, which is normal for