100GE以太网技术介绍
Backbone Internet bandwidth maintained by the major Internet carriers has been expanding at 75 to125% per year, driven by expansion in the number of broadband Internet users and growing use of bandwidth-
hungry applications.
2AbstractAdvances in data center technology and Internet usage have pushed enterprises to 10 Gigabit Eth-ernet (Gbps) links and search engines, carriers, ISPs to multiple 10 Gbps links. Projected growth mandates the need for higher speed Internet connections. An IEEE Task Force has been established with the objective of standardizing 40 Gbps within the data center and 100 Gbps between major Internet nodes. If higher speed Ethernet is to be a success it must take advantage of existing data center copper and longer-reach fiber cables. The first implementation of the adopted PCS layer for PCS lane distribution was demonstrated by Ixia in mid 2008.The.Need.for.SpeedThe amount of backbone Internet bandwidth maintained by the major Internet carriers has been expanding at 75 to125% per year1, driven by the explosion of broadband Internet users and growing use of bandwidth-hungry applications. Video-centric applications are the main contribu-tors, including high-definition IPTV, video distibutors such as YouTube , and video conferencing services. Other significant bandwidth gobblers include peer–to-peer sharing, virtual private net-works, wireless backhaul, gaming, and various forms of online collaboration. Figure 12 illustrates the changing nature of Internet usage from 2006 to 2012 (estimated).Figure 1. Changing Internet Usage1 Impairments, I. PG. Coffman and A. M. Odlysko, “Growth of the Internet,” Optical Fiber Telecommunications IV B: Systems and 2 IDC Report on U.S. Consumer Internet 2007-2011 Forecast, June 2007, Kaminow and T. Li, eds. Academic Press, 2002, pp. 17-56.