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40G/100G Ethernet Background研发背景

2010年6月10日 / 232次阅读
以太网

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In July 2006, the IEEE Higher Speed Study Group was formed to look into the next evolutionary step after 10 Gigabit Ethernet. In the past, Ethernet speeds would increase by a factor of 10. However, the next generation jump from 10 Gigabit to 100 Gigabit has proven to be a technological challenge. Some within the IEEE group felt that 100 Gig made sense for Telco’s and other backbone network providers, but not as a next step for servers—it was simply more speed and expense than needed for the near future. While the IEEE initially planned to standardize only on 100G Ethernet as the next step after 10G, server vendors initiated a push in early 2007 to include 40G Ethernet in the standard, with the rationale that the effort used to develop 40G Ethernet would be leveraged into 100Gi, and that in 2010, 40G would be a better match for server I/O than 100G.

In July 2007, the IEEE 802.3ba study group was named, and it is the first standard to include two different Ethernet speeds—the 40 Gbps rate for local server applications, and the 100 Gbps rate for internet backbone—to serve both market needs. In June 2010 the official 802.3ba standard was ratified, opening the field to higher performance in server systems and components, data centers, network storage and systems, high performance computing (HPC) clusters, data centers, carriers, and the like.

以往以太网速率升级,都是10倍为单位。但是从10G以太网到100G以太网,有很大的技术难度。2006年成立工作组,但是工作组的人觉得100G的速率,只在运营商的骨干网上有需求,企业网络近期没有100G的需求。2007年,企业网络界人士说,企业网40G就可以满足需求了,而且开发40G的以太网和开发100G的以太网,所需要做的工作很多是重叠的。

于是在2007年,802.3ba工作组成立,同时开发40G和100G的以太网。

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