O'Reilly logo

Ethernet: The Definitive Guide, 2nd Edition by Joann Zimmerman, Charles E. Spurgeon

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 11. 10 Gigabit Ethernet

The IEEE 10 Gb/s standard was first specified in the 802.3ae supplement, which was adopted in 2002. This supplement defined the basic 10 Gigabit system and a set of fiber optic media standards. Subsequent 10 Gb/s supplements have added copper media types, including a short-range copper connection based on twinaxial cable and a twisted-pair media system capable of reaching 300 m. This chapter describes the copper media systems first, and then the fiber optic systems.

Table 11-1 lists several of the supplements created during the development of the 10 Gb/s Ethernet standards. These supplements have since been incorporated into the main 802.3 standard as Clause 44, “Introduction to 10 Gb/s baseband network,” and Clauses 46 through 55, which describe the media systems and other elements.

Table 11-1. 10 Gigabit supplements
Supplement Date Identifier

802.3ae

June 2002

10 Gb/s and fiber optic media systems

802.3ak

February 2004

10GBASE-CX4 twinaxial copper media

802.3an

June 2006

10GBASE-T twisted-pair copper media

802.3aq

September 2006

10GBASE-LRM 10 Gb/s over multimode fiber

The 10 Gb/s media systems support full-duplex mode only. In the modern era of switched Ethernet ports with full-duplex media links connecting ports to devices, the normal operating mode is full duplex. The Gigabit Ethernet half-duplex mode was never adopted by vendors, and given the timing constraints, a half-duplex mode for 10 Gb/s operation made even less sense than it did for 1 Gb/s Ethernet. ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required