“Processing Board Sharing to Reduce both the Energy and Cost for High Speed Routers”

Dr. Bin Liu, Tsinghua University, China

Friday, November 11, 2011 - 10:00am - 12:00pm

Core Buliding - Lecture Hall


Internet traffic grows exponentially in both the users and the traffic volume, which makes the backbone routers over-sized in the scale of interfaces and over-loaded in the processing power, while the energy consumption grows in a dramatically demand as well. In the traditional routers, the interface part and the packet processing part are one-to-one binding, which makes a low usage for the line-card when traffic is light, leading to high implementation cost, large energy consumption and rigid scalability when scaling to more network interfaces. To reduce the cost, cut down the power consumption and enhance the scalability, in this talk, I propose an architectural innovation for the future router design. I present a new architecture of router which separates router’s line-card into two parts: interface board and processing board. Traffic from all the interfaces is shared by all the processing boards in a router, so we can aggregate the traffic to several a few processing boards and shut down others to save energy when traffic is light. When the aggregated traffic is increasing, the router will wake up the sleeping processing card dynamically and adaptively in an on-demand manner. Given the aggregation of traffic from all ports of a router, there is a small probability that most of them reach up to a peak fluctuation simultaneously, so the entire utilization of processing parts of line cards should be low at most of the time. This gives us a great opportunity to reduce the power consumption of a high speed router.
I this talk, I will briefly describe the architectural innovation, and outline the challenging issues together with the preliminary simulation results.


Bin LIU is a full professor in Tsinghua University since 1999. He received his Ph D degree from Northwestern Polytechnical University, China in1993. His current research areas include high performance switches/routers, network processors, traffic measurement and management, Internet power saving as well as the future Internet. He co-authored the book of “High Performance Switches and Routers” and holds 21 patents in China and abroad. He has served as the TPC Co-Chair for the IWQoS2010, TPC Co-Chair for the Symposium on Next-Generation Networking and Internet Advances in ICC2011, the TPC Co-Chair for the Symposium of IEEE International Conference on Communications in ICC2008, Guest Editor for IEEE Journal on Selected Areas in Communications in 2006. He served as TPC members for many conferences/workshops such as IEEE INFOCOM. He has won a high volume of honors and rewards including the Distinguished Young Scholar of China and the National Top Young Scientist Award, the inaugural Applied Network Research Prize sponsored by IRTF and ISOC in 2011.