Riverbed Stingray Traffic Manager Software Selected as Certified Load Balancer for Microsoft Lync 2010

SAN FRANCISCO—November 28, 2012— Riverbed Technology (NASDAQ: RVBD), the performance company, today announced that Riverbed^® Stingray™ Traffic Manager, a software and virtual edition application delivery controller (ADC), is now a certified load balancer for Microsoft^® Lync^® 2010. The software was tested by Riverbed and certified by Microsoft to meet Lync Server 2010 load balancer requirements. This certification brings Stingray Traffic Manager software's performance benefits to Microsoft Lync 2010, enabling enterprise employees to be more productive and better collaborate whether by phone, instant message or web conference.

Stingray Traffic Manager software optimizes performance and delivers scalability to Lync by load balancing between pooled servers, increasing Lync's ability to deliver highly-available and reliable communications services for enterprise users. Lync can also be deployed with Domain Name System (DNS) load balancing, a cost-effective form of application-level load balancing that manages inbound traffic within the network. Stingray Traffic Manager software works in conjunction with DNS load balancing by managing all HTTP/HTTPS traffic, reducing the workload for DNS load balancing to further optimize Lync performance.

Lync enables Microsoft Exchange 2010 and SharePoint 2010 enterprise users to keep track of their contacts' availability; send instant messages; start or join an audio, video, or web conference; or make phone calls - all through a consistent and familiar interface. As networks struggle to manage large amounts of data between many users, enterprise applications face increasing performance challenges. Lync accommodates this increase in network traffic and helps scale to a large numbers of users by using multiple front end and edge servers as a single pool of resource that creates a set of reusable server connections, which is then managed from a single interface.

"Riverbed and Microsoft continue to work together on many key areas to cost-efficiently improve the performance and reliability of platforms used by businesses around the world," said Apurva Davé, vice president of products and marketing, Stingray Business Unit at Riverbed. "The latest testing and certification for Lync reaffirms the commitment from Microsoft and Riverbed to integrate the leading communications and performance platforms, guaranteeing end users an improved experience, and enhanced ability to effectively communicate in the workplace."

The qualification program for Microsoft Lync load balancer partners includes specific requirements for interoperability with Lync Server 2010, including scenario testing, comprehensive documentation and support, and enterprise-class reliability and scalability. A comprehensive guide for deploying Stingray Traffic Manager software as a load balancer for Microsoft Lync 2010 is available at
http://www.riverbed.com/assets/media/documents/deployment_guides/stingray_traffic_manager_deploy_microsoft_lync_2010.pdf.

This press release contains forward-looking statements, including statements relating to the expected demand for Riverbed's products and services, statements regarding expected developments in data centers and the implementation of public cloud strategies and other technology frameworks, statements relating to Riverbed's ability to grow market share or grow the market as a whole, and statements relating to Riverbed's ability to meet the needs of distributed organizations. These forward-looking statements involve risks and uncertainties, as well as assumptions that, if they do not fully materialize or prove incorrect, could cause our results to differ materially from those expressed or implied by such forward-looking statements. The risks and uncertainties that could cause our results to differ materially from those expressed or implied by such forward-looking statements include our ability to react to trends and challenges in our business and the markets in which we operate; our ability to anticipate market needs or develop new or enhanced products to meet those needs; the adoption rate of our products; our ability to establish and maintain successful relationships with our distribution partners; our ability to compete in our industry; fluctuations in demand, sales cycles and prices for our products and services; shortages or price fluctuations in our supply chain; our ability to protect our intellectual property rights; general political, economic and market conditions and events; and other risks and uncertainties described more fully in our documents filed with or furnished to the Securities and Exchange Commission. More information about these and other risks that may impact Riverbed's business are set forth in our Form 10-Q filed with the SEC on October 25, 2012. All forward-looking statements in this press release are based on information available to us as of the date hereof, and we assume no obligation to update these forward-looking statements. Any future product, feature or related specification that may be referenced in this release are for information purposes only and are not commitments to deliver any technology or enhancement. Riverbed reserves the right to modify future product plans at any time.