Broadcom Enables Programmable 100-GbE Switches

Broadcom has introduced a new line of 100-Gbps Ethernet (GbE) switch processors that can be reprogrammed to add new functionality and support new protocols as they come along. The BCM88030 network processor unit (NPU) can be deployed in switches in the Internet back-haul layer after traffic is aggregated from the access layer, be it at the base station of a wireless network or where multiple endpoints on an ISP’s wired network come together at "the on-ramp to the Internet, if you will," says Nicolas Tausanovitch, senior product line manager at the company's infrastructure and networking group.

Internet back-haul switches are being asked to handle exponentially more traffic than that on typical data center or enterprise networks, he says. While those networks are gradually transitioning from 1GbE connectivity to 10GbE, to 40GbE and eventually 100GbE, most service provider and Internet back-haul networks are going to completely skip over the 40GbE step.

A forecast from Infonetics Research predicts a compound annual growth rate of 170% in the number of 100-Gbps ports deployed through 2016.

Infonetics released a survey in January of service providers and their 40G/100G deployment plans. It showed that the top three reasons operators are deploying higher-speed 40G/100G equipment are to lower the cost per bit for new transmission, to gain superior performance and to lower incremental equipment costs. Also, most respondents indicated that 40G, if they are deploying it, is only a short-term solution and that they will move the majority of installations to 100G once those products are more widely available.

NPUs from Broadcom and other vendors already feature programmability so that functionality can be added and new protocols can be supported as they are developed. A "fixed-function" device would be too expensive to replace with one with new features, says Tausanovitch. But what’s new with the BCM88030 is that it includes a microcode development environment, which is essentially a software development kit, so end users can reprogram the processor.

"In the past ... if customers needed to change the functionality, they could ask us to customize the software and provide it to them. But the tools that we used were not at all user-friendly," he says. "What we offer here is the ability to have a device that users can reprogram to address new protocols."

The BCM88030 family features 64 custom processors running at 1GHz, delivering what Broadcom says is more than twice the throughput of any other NPU on the market. The 100-Gbps processor can be mixed in with 1-Gbps and 10-Gbps processors in a network line card as the customer sees fit. The new processor eliminates costly external components, dramatically reducing system cost and power consumption by up to 80% per port.Network traffic growth is driven by many factors, including the transition of wireless carrier networks to 3G and 4G speeds; dramatic growth in the number and capacity of endpoint devices, such as smartphones and tablet computers; demand for greater bandwidth for consumer Internet users for video streaming; and the need for enterprise cloud computing.

Last November, Brocade claimed the world's largest single-site deployment of 100 GbE in a research institute--Janelia Farm Research Campus--improving efficiency by 50%. Two months ago, Cisco introduced 100-GbE capabilities on its Nexus 7000 switch line for data center and service provider networks

Broadcom cites industry research that by 2015, 1 million minutes of video content will traverse the network every second; that between 2011 and 2015, global mobile data traffic will increase 18-fold; and that the number of devices connected to IP networks will become two times larger than the world’s population by 2015.

While service provider networks need a 10-fold increase in speed from 10 Gbps to 100 Gbps, service provider network resources aren’t growing at the same rate, says Tausanovitch. "They’re not getting an order of magnitude more rack space in the service provider central office, and they’re certainly not getting an order of magnitude more budget or 10 times more power, so the service providers are being squeezed."

According to news reports, other NPU vendors that have introduced 100-Gbps processors include Xelerated, of Sweden, which announced production of its HX family of processors in September 2011. PMC-Sierra introduced a 100-Gbps processor in January 2011. Alcatel-Lucent, meanwhile, introduced a 400-Gbps NPU in June of last year.

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