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Wednesday, October 19, 2011

10GbE has been waiting a long time to transition from being the heir apparent to a ubiquitous replacement for 1GbE.  This report provides a forecast for 10GBASE-T—for adapters and LOMs (LAN on Motherboard), and 10GBASE-KR (for backplanes used in blade servers).  Here are some of the many reasons behind this forecast.

Optical 10GbE port shipments have finally started to take off:  Going forward, SFP+ will be the dominant optical interface.  10GbE SFP+ port shipments with a reach of less than 300 meters that are used in server to switch and some switch-to-switch applications have tripled over the past three quarters, and LightCounting expects the high growth trend to continue.

10GBASE-T for adapters becomes feasible in late 2011:  Because the use of 10GBASE-T PHYs, on dual port server adapters (the predominant version of shipping adapters), has not been feasible to date and optical interconnects are much more expensive than copper once these products reach the end user, the market for 10GbE has been stunted.  With the newest versions of 10GBASE-T PHYs, developed using the 40nm semiconductor process, the power constraints of 10GBASE-T are finally being overcome, enabling dual-port 10GbE adapter sales to begin in earnest.  However, the mass rollout of 10GbE interconnects will not occur until most rack servers are equipped with 10GbE LOMs begin shipping in 2014.


10BASE-KR for Blade Servers has been shipping since 2009:  In March 2009, HP announced the first 10GbE LOM in its Blade servers under the BladeSystem brand when it refreshed its blade servers with Intel’s new Nehalem family of processors.  HP used Broadcom 10GbE controller chips with 10GBASE-KR PHYs.  Once Blade servers offered LOM implementations of 10GbE, 10GbE port volumes grew dramatically.  The significance of LOM is huge.  Previous to this generation of blade servers, 10GbE could only be enabled via adapter cards.All x86 servers ship with at least one CPU from either Intel or AMD, at least a few gigabytes of memory, and in almost all cases, at least one disk drive.  It is hard to differentiate one OEM’s Intel or AMD CPU or memory or disk drive; consequently, the I/O (input and output) peripherals and architecture is where the money is.  Over the past ten years, Fibre Channel became a very profitable part of the server OEM portfolio.  OEMs do not want to lose the opportunity to upsell I/O hardware and software solutions by quickly commoditizing the I/O by putting 10GbE as the standard (free) I/O solution.  









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