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27 Apr 2016

The QSFP+ optical transceiver is the dominant transceiver form factor used for 40 Gigabit Ethernet applications. In the year of 2010, the IEEE standard 802.3ba released several 40-Gbps based solutions, including a 40GBASE-SR4 parallel optics solution for multimode fiber. Since then, several other 40G interfaces have been released, including 40GBASE-CSR4, which is similar to 40GBASE-SR4 but extends the distance capabilities.

As is know to all, two switches are connected by either transceiver modules or cables. For example, if you simply wanted to cable up two Nexus 3000s with 40GbE, the options are multi mode fiber or twinax copper. We’ll only cover the fiber throughout this post as that is where most of the questions are in recent...

15 Apr 2016
What Is 40 Gigabit Ethernet?

With the development of telecommunications, 40Gigabit Ethernet (40GbE) standard was launched by the IEEE in June 2010, which enables the transfer of Ethernet frames at speeds of up to 40 gigabits per second (Gbps). It also addresses physical layer specifications for communication across backplanes, copper cabling, multimode fiber and single-mode fiber. Nowadays, 40G applications are gaining more popularity with the development of the 40GbE. It become a new generation of high-speed, high-demand, computing applications and technologies.

Like 1GbE or 10GbE network, the heart of the 40GbE network layer is a pair of transceiver modules which are connected by a patch cable. The transceiver modules and patch...