& cplSiteName &

What Color Is That Optical White Box?

Sterling Perrin
10/24/2017
50%
50%

The future of "optical white box" was a topic of discussion, debate and some confusion at Light Reading's recent NFV and Carrier SDN event in Denver. So it makes a lot of sense to give some further thought in this blog to the future of optical white box and what it means -- and doesn't mean -- for optical networking.

Like many others, the "white box" term and concept comes from enterprise IT, where it describes generic, COTS (commercial off-the-shelf) hardware servers and switches that are decoupled from the software operating systems that run on top -- i.e., hardware and software can be, and are, supplied by different vendors yet work seamlessly together. Enterprise white box also assumes x86-based processing.

Porting "white box" terminology into optical networking is where confusion and debate arises. To address the so-called optical white box, let's start with the technology evolution in optics that is characterized by moves from proprietary to merchant technology, and from closed to open.

The first technology enabler is pluggable optics modules. Optical components and silicon are contained in miniaturized and standardized form factors that can be plugged into compatible hardware systems. Pluggable form factors have been common on the client side for years. The application of pluggable modules on the line side for long-reach transmission (most notably CFP variants) is the more recent innovation that has cracked the historical lock in optics hardware.

Coupled with pluggable line-side modules is the rise of merchant DSP silicon for coherent 100G and 100G+ DWDM transmission. There are now several vendors supplying merchant DSPs to the optical industry, but credit here really goes to Acacia for pushing the envelope on innovation and forcing homegrown DSP/hardware vendors to catch up. With several merchant DSP products to choose from -- from the low end to the high end -- optics vendors no longer need in-house ASIC design in order to lead. Ciena's surprise move earlier this year to sell its WaveLogic Ai DSPs on the open market is the strongest indicator of how the coherent DWDM market is swiftly shifting from homegrown to merchant. (See Ciena Sets Its WaveLogic Free.)

The last piece to discuss is the software operating system. Optical networking systems are moving from closed to open with the advancement of open APIs that allow third parties to update and program optical systems in a way that was never before possible. Open APIs originated with Webscale Internet companies, but are now of interest to traditional network operators around the globe. Some open API examples include NETCONF, YANG, OpenFlow, T-API and OpenConfig, among others.

Most industry observers will agree on the optics trends described above. But how do these trends square with the white box concept? An obvious point is that the central role of x86-based processing simply doesn't translate to the world of optics. Optics is adopting merchant silicon and pluggable transponders, but x86 is not part of this picture.

The trickier issue to sort out is decoupling the operating software from the hardware. Such separation is essential to the enterprise white box and is also part of the Telecom Infra Project's Voyager packet optical system. But beyond Voyager (which is not commercially deployed), we have not seen much vendor or telecom network operator interest in this decoupling. Rather, operators want open APIs to gain direct access to vendor hardware to accelerate innovation, better customize products to their own specific requirements, and break from rigid vendor release cycles.

It is not clear that fully decoupling the operating system from optical hardware significantly advances their automation and innovation goals, yet it adds operational complexity. Not surprisingly, vendors are reluctant to push the fully decoupled white box model, but we don't think their telecom customers are strongly pushing for it either.

Optical white box will evolve differently from enterprise white box, and for this reason, the term itself probably does more harm than good. Optics is increasingly moving from closed to open and from proprietary hardware to merchant hardware. Disaggregation has some role to play, but it is not an end by itself. These are the key trends that the industry must be aware of, regardless of what color we label the box.

— Sterling Perrin, Principal Analyst, Heavy Reading

(3)  | 
Comment  | 
Print  | 
Newest First  |  Oldest First  |  Threaded View        ADD A COMMENT
Sterling Perrin
50%
50%
Sterling Perrin,
User Rank: Light Sabre
10/25/2017 | 9:12:06 AM
Re: Agree to Disagree?
Ethertype,

I wouldn't want to limit the definition to terminals only, so, yes, the line should be included. Actually, recent HR survey data shows that the line system is of highest interest - among optical systems/segments -- for disaggregation. Interesting comment about the low share of white box in data center switching market. I think, due to greater complexity, optics would track even lower adoption then the data center market. 

 

Sterling
ethertype
50%
50%
ethertype,
User Rank: Light Sabre
10/24/2017 | 6:03:35 PM
Re: Agree to Disagree?
You seem to be implicitly limiting the definition of an optical whitebox to something that includes transponders. The other, arguably more practical, category of optical whitebox is line system components. For example, Lumentum sells a line of what they call "SDN Whitebox" products including ROADMs, muxes, and amps.

Whitebox is not a technology, it's a business model / commercial proposition. Even if the technology trends enable greater degrees of disaggregation that doesn't mean customers will actually choose to buy the technology in the form of a whitebox. After years of whitebox data center switching products being available on the market, they have still captured only low single-digit % market share.
Sterling Perrin
100%
0%
Sterling Perrin,
User Rank: Light Sabre
10/24/2017 | 5:00:18 PM
Agree to Disagree?
I am really hoping to get some feedback on the definitions and expectations for optical white box here. There is a lot of confusion. I'm open to all views - including differences of opinion -- as I don't think this concept has been settled yet.

Sterling
More Blogs from Heavy Lifting Analyst Notes
For the first time, Light Reading will offer two breakfast roundtables on key tech topics at this fall's SCTE|ISBE Cable-Tec Expo in New Orleans – the first on network virtualization and the second on cable and 5G.
As a keen OSS-BSS observer, I like to parse financial disclosures to gauge the health of the market.
For any operator, revamping an entire business support system (BSS) architecture in just six months and cutting IT opex by 80% as a result is a notable achievement.
Dedicated 5G campus networks, designed to meet the coverage, performance and security requirements of industrial users, are one of the most exciting – and tangible – advanced 5G use-cases under development.
LiFi is the latest effort to bring optical wireless communications into the commercial communications networking fold.
Featured Video
Upcoming Live Events
September 17-19, 2019, Dallas, Texas
October 1-2, 2019, New Orleans, Louisiana
October 10, 2019, New York, New York
October 22, 2019, Los Angeles, CA
November 5, 2019, London, England
November 7, 2019, London, UK
November 14, 2019, Maritim Hotel, Berlin
December 3-5, 2019, Vienna, Austria
December 3, 2019, New York, New York
March 16-18, 2020, Embassy Suites, Denver, Colorado
May 18-20, 2020, Irving Convention Center, Dallas, TX
All Upcoming Live Events