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キャリアのSDN(ソフトウェア定義によるネットワーク)調査:ネットワーク自動化とディスアグリゲーション(ソフトウェアとハードウェアの分離)への道筋

Charting the Path to Network Automation & Disaggregation: Carrier SDN Survey Analysis

 

出版社 出版年月ファイ ル/CD-ROM価格 ページ数
Heavy Reading
ヘビーリーディング社
2018年2月US$3,495
エンタープライズライセンス(PDF)
22

サマリー

米国調査会社ヘビーリーディング社(Heavy Reading)の調査レポート「キャリアのSDN(ソフトウェア定義によるネットワーク)調査:ネットワーク自動化とディスアグリゲーション(ソフトウェアとハードウェアの分離)への道筋」は、世界のネットワーク事業者に関する詳細な調査から、キャリアネットワークのSDN(ソフトウェア定義によるネットワーク)の進化を査定している。非常に豊富な事業者のデータとヘビーリーディング社が行ったこの分野の6年間の調査に基づいている。パケット=光ネットワークのディスアグリゲーションとキャリアの広域ネットワークの自動化というSDNの重要な2分野に関するこの調査レポートは、ヘビーリーディング社の見識と過去の調査の積み重ねによるものである。

EXECUTIVE SUMMARY(PDF)

Since 2012, Heavy Reading has researched the application of software-defined networking (SDN) in carrier networks through global network operator surveys, one-on-one service provider interviews, and countless discussions and briefings with SDN software and hardware suppliers. With initial industry exuberance so high, it was inevitable that SDN would fail to live up to lofty expectations. In that context, today's environment of disenchantment – particularly for network functions virtualization (NFV), but also affecting SDN – should not be surprising.

But the SDN disenchantment storyline masks a timeline of true progress, evolution, and continued standardization. For one, the percentage of network operators reporting commercial SDN network implementations has doubled over the past 18 months. And, while SDN was inextricably coupled with NFV initiatives early on, we are now seeing SDN deployments accelerate independent of virtualization and NFV. Historically, major networking technology adoption trends have evolved over roughly ten years' time. Many believed that SDN would prove an exception and hit the mainstream faster, but perhaps not.

Charting the Path to Network Automation & Disaggregation: Carrier SDN Survey Analysis assesses the evolution of SDN in carrier networks through an in-depth survey of network operators around the globe. The survey-based project builds on an unparalleled wealth of operator data and insights gained from six years of extensive Heavy Reading primary research in this area. Building on our knowledge base and past survey work, we focus this SDN study on two critical areas: disaggregation in packet-optical networks and automation in the carrier wide-area network (WAN).

This research project is based on a Web-based survey of network operators worldwide, conducted in September 2017. Respondents were drawn from the network operator list of the Light Reading readership database. More than 180 people completed the survey; of that total, 142 were deemed qualified participants and were counted in the results. To qualify, respondents had to work for a verifiable network operator that generated at least $50 million in annual revenue.

In our survey, we wanted to understand why operators are deploying, or planning to deploy, SDN in their networks. The excerpt below shows SDN use cases according to the percentage that selected each as "high priority." We asked respondents to identify use case priorities in the next one- to three-year timeframe. Results show that many SDN use cases have high priorities, and automation is a key theme among them – whether it's across the WAN, across layers (such as IP and optical integration) or within the data center.

Charting the Path to Network Automation & Disaggregation: Carrier SDN Survey Analysis is published in PDF format.

 



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[プレスリリース原文]

Measuring Progress in Carrier SDN

Heavy Lifting Analyst Notes
Sterling Perrin,
Principal Analyst, Heavy Reading
2/9/2018
 
 

Six years on, is carrier SDN a success or a failure? It's not a simple question to answer. Perceptions are defined by one's expectations, and with early expectations for both SDN and NFV sky-high, failure to meet expectations was inevitable. But if we remove perceptions and expectations from the analysis, we get a more objective read on SDN's progress in carrier networks.

In our latest global operator survey results, recently published in Charting the Path to Network Automation & Disaggregation: Carrier SDN Survey Analysis, 35% of respondents reported that they are at some level of commercial SDN deployment, with the remaining 65% at various stages of trials and market education. Yes, there is a long way to go in both depth and breadth of SDN adoption, but the percentage reporting commercialization is double the figure reported in our 2016 carrier SDN survey. It may not be as much progress as some initially hoped for, but the SDN commercialization needle is moving.

Progress can also be observed in the relationship between SDN and NFV. When defining NFV, ETSI was clear in stating that NFV and SDN were complementary but different technologies. Still, their early histories were closely intertwined and it was difficult to identify much carrier SDN activity outside the virtual world. But Heavy Reading data illustrates that SDN is, in fact, advancing commercially, and often separately from NFV initiatives. In other words, while SDN is still often coupled with NFV, the technology trend has a distinct and separate trajectory from NFV.

In the past couple of years, we have seen operators globally commercialize networks with SDN control of optical elements (Layers 0/1), Ethernet switches (Layer 2) and IP routers (Layer 3). For the most part in these carrier networks, SDN controls physical hardware elements, not virtualized software implementations running on COTS servers. Beyond CPE and access, performance requirements are typically too demanding for COTS, and, in the case of optics, there is no way to virtualize a photon. Successfully applying SDN to the physical world is critical for operators because physical elements make up the vast majority of their networks. Progress in the physical works is a good sign.

A promising -- though challenging -- next step is to begin applying SDN control across network layers, and particularly across the IP and optical layers. While operators are applying SDN to optical networks and IP networks today, they are applying it separately, such that the layers remain largely isolated islands of operation.

Such software-based integration is important to operators. In our survey, 68% of respondents reported that SDN-based IP and optical integration as at least "very important" for their next-generation networks, with 27% of the group identifying IP and optical integration as "critical." In fact, SDN-based IP and optical integration scored higher marks on the priority list than element disaggregation -- a more high-profile trend that was also a topic in our survey.

Not surprisingly, operators cited lack of standardization as a top barrier to commercial progress in integrating IP and optical control and management. Here, the physical elements story echoes the one playing out today in the virtualized world. Applications work well in tightly controlled environments -- within a data center, across a private data center network, or within a single vendor domain. But SDN's (and NFV's) greatest benefits will come when it can control complex network scenarios, across multiple domains, vendors and network layers. To master complexity, there is a lot work still to be done.

For more about our global carrier SDN survey, please see Charting the Path to Network Automation & Disaggregation: Carrier SDN Survey Analysis.

— Sterling Perrin, Principal Analyst, Heavy Reading

 

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