40 and 100GbE Ethernet

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According to an article published this week on internetnews.com, the HSSG (Higher Speed ​​Study Group) of the IEEE 802.3 has decided that the next speed for Ethernet is 40GbE and 100GbE.

HHSG had originally planned to go for 100GbE only, but industry opinions somewhat changed their plans.

"The reason for choosing both speeds is that the two application areas have different growth rates," says John D'Ambrosia, president of HHSG, in the article. "At the beginning of the year, following the decision to choose 100GbE speed, some individuals in the server industry said that this speed did not meet the needs of their markets."

D’Ambrosia explains that servers are doubling their bandwidth needs every 24 months, while the bandwidth needs of the core network are doubling every 18 months.

The 40GbE speed will be reserved for server and computing applications and the 100GbE speed will be used for core networking and aggregation applications.
For 40GbE, there will be specifications for at least three physical layers, so that they are compatible with 40GbE operations, including at least: 100 meters in OM3 multimode fiber, 10 meters in copper cable and 1 meter in communication bus (backplane). For 100GbE operations, the physical layer specifications will include 40km of single-mode fiber and at least 10 meters of copper cable.

However, while Ethernet addresses both speeds, 40GbE and 100GbE, it will not do so with two different standards.

"We will develop an amendment that covers both speeds," says D'Ambrosia.
Among the difficulties that are likely to arise as the new standard is developed are problems related to power and heat, although D’Ambrosia is confident that they can be solved.

The new IEEE specification must also find a way to work with the existing OTM (Optical Transport Networking), specifically at 40Gbps (OC-768).
According to D’Ambrosia: "There could be a draft ready for next year and then we will try to get the standard approved sometime in 2010."

Source: Internet News

Video: HSE Higher Speed Ethernet - testing 100GBE and 40GBE

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