The IEEE working group802.3ae has been working on the standardization of 10 Gbit/s Ethernet( 10GbE) and the elaboration of the 10GbE layer model since 1999 and has defined the following basic elements for this HS technology: Retention of the 802.3 and Ethernet frame format and the existing minimum and maximum frame length, and coexistence with Power over Ethernet( PoE) according to 802.3af.
Compliance with IEEE 802 Functional Requirements with the exception ofHamming distance, support for star structures with point-to-point( P2P) connections and only one full duplex mode according to IEEE 802.3x. In addition, structured cabling according to ISO/IEC11801 in the latest version was included. Several physical interfaces have been defined: for example, via multimode fiber, monomode fiber, twinaxial cable, twisted pair and backplane.
Under the IEEE 802.3ae working group, several interface standards have been adopted for different media. 802.3ae distinguishes between short (S), long (L) and extremely long (E) for multimode fibers and monomode fibers, which can be used to bridge distances between 100 m and 40 km. The letters S, L and E refer to the wavelength. In terms of copper-based transmission media, the standard provides for STP cables, twinaxial cables and connections via the traces of the backplane circuit board. The bridgeable distances are in the meter range or below.
Since the 802.3ak working group also dealt with 10 Gigabit Ethernet over STP cables, and had specified a copper-based 10GbE interface for short distances with 10GBase-CX4, the 802.3ae and 802.3ak working groups were merged in 2005.