Avoiding disruptions during maintenance operations on BGP sessions

Impact Analysis of BGP Sessions for Prioritization of Maintenance Operations (CMU-CyLab-10-018)

Network operators in large-scale networks are often faced with long lists of maintenance tasks and find it difficult to track the relative importance of these tasks, without knowing their impact on the network’s operation. As a result, operators may react slowly to critical tasks, increasing network downtime and maintenance costs. We present a system that quantifies the impact of maintenance ta...

Let BGP speakers configure their iBGP sessions on their own

ISPs face many problems with the current iBGP. First, operating iBGP is costly as it requires human configuration and supervision of all the iBGP sessions. This configuration is error prone and hard to troubleshoot. Secondly, the introduction of Route Reflectors, to solve scalibility issues, has led to a reduced path diversity within the routers of the network. It has been showned that Losses o...

Scheduling response operations under transport network disruptions

Modeling the complex decision problems faced in the coordination of disaster response as a scheduling problem to be solved using an optimization algorithm has the potential to deliver efficient and effective support to decision makers. However, much of the utility of such a model lies in its ability to accurately predict the outcome of any proposed solution. The stochastic nature of the disaste...

Multi-layer Network Recovery: Avoiding Traffic Disruptions Against Fiber Failures

The next generation backbone networks, optical IP/MPLS networks, enable increasingly higher volumes of information to be transported. In this network architecture, a fiber failure can result in a loss of several terabits of data per second and leads to multiple failures in the upper network layer. Thus, the ability of the network to maintain an acceptable level of reliability has become crucial...

Modeling of Maintenance Operations