Ethernet: Reduced Gigabit Media Independent Interface (RGMII)
Even worse than the original MII, GMII used too many pins. For full tri-mode (10/100/1000) operation, a full 25 were required. This is becoming problematic not only for switches, but ordinary processors and FPGAs.
As when the RMII Consortium formed to produce RMII, a group of silicon makers got together to produce a Reduced Gigabit Media Independent Interface (RGMII). Since this was performed external to the ethernet working group, this interface will not be found in IEEE 802.3. The standard needs to be sourced separately. With distribution largely unrestricted, copies of the standard are mirrored locally: RGMII Version 1.3, Version 2.0.