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The $7.5 billion-a-year data center Ethernet switching market is in the middle of an extremely tough product transition. But, an even tougher one is just around the corner, and before it's over, many vendors may find themselves forced out of a radically changed switch marketplace.
The transition that is currently underway involves the shift from 1 gigabit Ethernet to 10 gigabit Ethernet (GbE) switching. A third of all servers now use the faster devices, but customers are still choosing from a limited choice of vendors, five years after 10-GbE products first went on sale. That's because five of the 10 largest switch makers don't yet offer 48-port single rack unit 10G Base-T products, the configuration most enterprises prefer. Many customers have not yet finalized their 10-GbE migration plans, having settled on neither a timetable nor a form factor for their purchases.
We expect many of these issues will be resolved by the end of 2013. But because of the insatiable appetite for faster networks, as soon as the 10-GbE transition is in its final stages, the industry will be grappling with the move to 40-GbE units. And that, we predict, will be the most critical transition in its history.
What makes the 10-GbE to 40-GbE shift so vexing? Largely the changing nature of enterprise IT, which, from the perspective of vendors, is dramatically shrinking the available market size. Many enterprise customers are shifting toward cloud and software-as-a-service (SaaS) architectures, in effect outsourcing their data center rather than building it themselves. In fact, over the next three years, many businesses will literally be buying their last server and their last switch in the data center; companies will have completed the shift away from premise-based data center IT solutions once they've outlived their usefulness. One of the results of this new IT approach will be a decline in overall capital spending, along with an unprecedented concentration of purchasing power in the hands of a relatively small number of cloud customers. These trends are immediately apparent in Dell'Oro Group projections for the data center Ethernet switch market.
For example, in 2012, major cloud customers such as Google, Facebook, Amazon, Rackspace and Verizon Terremark accounted for less than a quarter of the industry's $7.5 billion in sales. We project the overall market will potentially grow by 21 percent, to $12 billion, by 2017. But, most of that growth will be provided by a concentrated few cloud customers. Remarkably, total annual enterprise spending on switches will be lower in five years than it is today, even though the market will have substantially increased.
In addition to these obvious marketing hurdles, there is also a technical challenge confronting switch vendors as they contemplate 40 GbE.
Already, they are struggling to support two platforms: 1 GbE and 10 GbE. But the 40-GbE rollout will mean adding 40-GbE product lines to their SKU lists, further taxing engineering resources that are already under stress. Making matters worse is the fact that there is not yet an ISO standard for a small enough 40-GbE port form factor. The current ISO standard for 40-GbE ports, called Quad (4-channel) Small Form-factor Pluggable, or QSFP, does not have a small enough size to be effective in server access.
And, hovering over all these issues is the emergence of software-defined networks, which is expected to not only change the architecture of enterprise data centers but also result in fewer switches and more controllers -- another challenge to switch vendors. Much has been written about SDN, and its exact impact remains uncertain. But at a minimum, we expect the move to SDN to further strengthen the hand of big cloud customers, which, because of their high-profit margins, often have more hardware and software design resources at their disposal than all but the biggest traditional vendors.
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