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10-Gigabit Ethernet off to a running start

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The first hurdles have been cleared for 10-Gigabit Ethernet, and the technology is about to take the next step toward standardization in the IEEE.

The 10-Gigabit project is expected to be authorized in January, paving the way for the first official meeting of the 10-Gigabit Ethernet task force, in March. The eventual specification is expected to receive the designation IEEE 802.3ae.

One major obstacle was settling on a speed. There was a debate raging in the IEEE's high-speed study group over whether the actual speed should be exactly 10G bit/sec or 9.584640G bit/sec. The latter speed matches the payload rate of OC-192 Sonet, and its proponents pushed for that speed because they want to use a Sonet-based infrastructure to transmit 10-Gigabit Ethernet over wide-area networks.

The group compromised a bit, deciding in September to specify a 10-Gigabit media access control layer. As I understand it, this still allows vendors to build some logic into the physical layer to adjust between the 10G bit/sec running in a LAN and the 9.584640G bit/sec of Sonet. Never fear; this will likely be transparent to enterprise users.

Jeff Caruso is senior editor at Network World, covering LAN hardware and network management software from his offices in San Mateo, Calif. In past reporting lives he has also written about WAN hardware, as well as mainframes and other computing platforms. You can reach him at jcaruso@nww.com.

10G Ethernet WANs?
Network World, 08/16/99.

Ethernet beyond the LAN
Network World, 07/28/99.

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