Yahoo! Japan Simplifies Data Center Network Operations with Apstra

As one of Japan’s largest ISPs, Yahoo! Japan needed to scale its data center network to efficiently handle the skyrocketing volume of data generated by business growth.


Company Yahoo! Japan
Industry Media and Entertainment
Region APAC
Yahoo Japan Image
Customer Success At-a-glance


Data center network management and operations 


Network issues easily and quickly



A network infrastructure that can carry massive amounts of data traffic is essential to realizing this vision, and Yahoo! Japan aggressively researches and deploys new networking technologies. According to Mr. Kenya Murakoshi, Senior Manager, System Group, Site Operations Division, Infrastructure Technology Group, “Yahoo! Japan Corporation has had its eye on Clos fabric networking technology for quite some time.”

“At Yahoo! Japan Corporation, the east-west traffic between servers and devices within a data center has been growing more than the traffic between the data center and the Internet,” says Mr. Murakoshi. “Other leading Internet service providers outside of Japan deploy Clos fabric networks that allow a flexible scale-out expansion in order to successfully address this challenge. Yahoo! Japan Corporation is following their path.”

The company already adopted a Clos fabric as part of a Hadoop data analysis infrastructure and plans to adopt it in other networks in the future. Yahoo! Japan needed to make full use of its flexible, scalable infrastructure, respond rapidly to the expansion of network equipment, and simplify the operation and maintenance of its ever-increasing devices.

These objectives, along with the need to scale the network to meet the massive amount of data generated by business growth, made it clear that it was impossible to respond to the need with only the current limited number of staff.

Yahoo Japan Challenge


Yahoo! Japan asked, “Is there a way to make the design, build, and operation of a Clos fabric somehow more efficient?” After extensive research and evaluation of many technologies and products, Yahoo! Japan selected Juniper Apstra System, a multivendor intent-based networking software solution as the answer to its question.

Yahoo! Japan Corporation’s Mr. Satoshi Tsuhata, Network Development Leader, Infra Tech 1, Site Operations Division, System Management Group, explains the value: “The Juniper Apstra System enables extensive automation and simplifies a Clos fabric network and earned high marks for design, build and operations. It was compelling to us to leverage the best practices of leading companies. Other products had some similar capabilities to Apstra, but Yahoo! Japan Corporation runs a multivendor environment, including white-box products, so Juniper Apstra’s hardware-inclusive solution was a very good fit for our needs.”

Mr. Kai Fukazawa, Acrapio, Inc., who is currently assigned to Yahoo! Japan Corporation’s US subsidiary, recalls, “Juniper Apstra System and intent-based analytics simplify Yahoo! Japan Corporation’s network design, build, and operations processes by abstracting the network configuration with ‘intent.’ This was a new concept to us, but once we became familiar with it ,the benefits were clear. Whenever we had questions, we made inquiries to Juniper Apstra’s support desk through the distributor. Juniper Apstra provided timely responses and the validation went very smoothly.“

Yahoo Japan Solution


After a two-month-long validation test, Yahoo! Japan formally selected Juniper Apstra, which was first deployed in the network infrastructure supporting Hadoop clusters for companywide data analytics. The first phase of deployment was about 30 network devices (500 nodes), which were migrated from the legacy network to the new Apstra Clos fabric network.

Mr. Kakuya Ando of Yahoo! Japan Corporation’s Infra Tech 1, Site Operations Division, System Management Group says that the introduction of Apstra significantly reduced the labor involved in network construction and operation. “All you need to do is to connect the switches to the network, and Juniper Apstra automatically configures them,” he says.

Mr. Murakoshi speaks highly about the benefits of the Juniper Apstra deployment, saying that Apstra’s capabilities brought agility to Yahoo! Japan’s network design, build, and operations. “Because the entire network management operations are now streamlined, we are able to focus more on other valueadded work. We are going to continue leveraging Apstra’s new capabilities and expand the adoption of Juniper Apstra at Yahoo! Japan Corporation.”

Yahoo Japan Outcome
"The efficiency of network construction and device replacement operations is greatly improved and we can easily replicate it; what used to take several days is now completed in tens of minutes! In addition, even if you make a mistake, for example with cabling, thanks to Apstra’s IBA telemetry, you can grasp the problem with a simple glance of the GUI."
Kakuya Ando Data Center Network 3, Site Operations Division, System Management Group

Published September 2021