Geoffrey G. Xie

Theory and New Primitives for Safely Connecting Routing Protocol Instances

By: 
Franck Le, Geoffrey G. Xie, and Hui Zhang
Appears in: 
CCR October 2010

Recent studies have shown that the current primitives for connecting multiple routing protocol instances (OSPF 1, OSPF 2, EIGRP 10, etc.) are pervasively deployed in enterprise networks and the Internet. Furthermore, these primitives are extremely vulnerable to routing anomalies (route oscillations, forwarding loops, etc.) and at the same time too rigid to support some of today’s operational objectives. In this paper, we propose a new theory to reason about routing properties across multiple routing instances. The theory directly applies to both link-state and vector routing protocols.

New Frontiers in Internet Network Management

By: 
Ehab Al-Shaer, Albert Greenberg, Charles Kalmanek, David A. Maltz, T. S. Eugene Ng, and Geoffrey G. Xie
Appears in: 
CCR October 2009

Network management represents an architectural gap in today’s Internet [1]. Many problems with computer networks today, such as faults, misconfiguration, performance degradation, etc., are due to insufficient support for network management, and the problem takes on additional dimensions with the emerging programmable router paradigm.

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.

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