Jia Wang

Detecting the Performance Impact of Upgrades in Large Operational Networks

By: 
Ajay Anil Mahimkar, Han Hee Song, Zihui Ge, Aman Shaikh, Jia Wang, Jennifer Yates, Yin Zhang, and Joanne Emmons
Appears in: 
CCR October 2010

Networks continue to change to support new applications, improve reliability and performance and reduce the operational cost. The changes are made to the network in the form of upgrades such as software or hardware upgrades, new network or service features and network configuration changes. It is crucial to monitor the network when upgrades are made because they can have a significant impact on network performance and if not monitored may lead to unexpected consequences in operational networks.

Scalable Flow-Based Networking with DIFANE

By: 
Minlan Yu, Jennifer Rexford, Michael J. Freedman, and Jia Wang
Appears in: 
CCR October 2010

Ideally, enterprise administrators could specify fine-grain policies that drive how the underlying switches forward, drop, and measure traffic. However, existing techniques for flow based networking rely too heavily on centralized controller software that installs rules reactively, based on the first packet of each flow. In this paper, we propose DIFANE, a scalable and efficient solution that keeps all traffic in the data plane by selectively directing packets through intermediate switches that store the necessary rules.

Towards Automated Performance Diagnosis in a Large IPTV Network

By: 
Ajay Anil Mahimkar, Zihui Ge, Aman Shaikh, Jia Wang, Jennifer Yates, Yin Zhang, and Qi Zhao
Appears in: 
CCR October 2009

IPTV is increasingly being deployed and offered as a commercial service to residential broadband customers. Compared with traditional ISP networks, an IPTV distribution network (i) typically adopts a hierarchical instead of mesh-like structure, (ii) imposes more stringent requirements on both reliability and performance, (iii) has different distribution protocols (which make heavy use of IP multicast) and traffic patterns, and (iv) faces more serious scalability challenges in managing millions of network elements.

Shedding Light on the Glue Logic of the Internet Routing Architecture

By: 
Franck Le, Geoffrey G. Xie, Dan Pei, Jia Wang, and Hui Zhang
Appears in: 
CCR October 2008

Recent studies reveal that the routing structures of operational networks are much more complex than a simple BGP/IGP hierarchy, highlighted by the presence of many distinct instances of routing protocols. However, the glue (how routing protocol instances interact and exchange routes among themselves) is still little understood or studied.

A light-weight distributed scheme for detecting ip prefix hijacks in real-time

By: 
Changxi Zheng, Lusheng Ji, Dan Pei, Jia Wang, and Paul Francis
Appears in: 
CCR October 2007

As more and more Internet IP prefix hijacking incidents are being reported, the value of hijacking detection services has become evident. Most of the current hijacking detection approaches monitor IP prefixes on the control plane and detect inconsistencies in route advertisements and route qualities. We propose a different approach that utilizes information collected mostly from the data plane.

Reliability as an Interdomain Service

By: 
Hao Wang, Yang Richard Yang, Paul H. Liu, Jia Wang, Alexandre Gerber, and Albert Greenberg
Appears in: 
CCR October 2007

Reliability is a critical requirement of the Internet. The availability and resilience of the Internet under failures can have significant global effects. However, in the current Internet routing architecture, achieving the high level of reliability demanded by many missioncritical activities can be costly. In this paper, we first propose a novel solution framework called reliability as an interdomain service (REIN) that can be incrementally deployed in the Internet and may improve the redundancy of IP networks at low cost.

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