An IP performance management infrastructure that has the twin frameworks of performance measurement and topology monitoring is proposed. By combining above frameworks, the infrastructure locates performance-degraded segments. Since the Internet is still highly prone to performance deterioration due to congestion, router failure, and so on, not only detecting performance deterioration, but also ...

Highly available and resilient networks play a decisive role in today’s networked world. As network faults are inevitable and networks are becoming constantly intricate, finding effective fault recovery solutions in a timely manner is becoming a challenging task for administrators. Therefore, an automated mechanism to support fault resolution is essential towards efficient fault handling proces...

A resilience strategy is introduced for networks implementing dual homing (dual parenting) of customers, specifically those employing Long-Reach PONs (LR-PONs). Assuming that some mechanism exists to detect network element failures, the discussion concentrates on protocols that propagate information about customer reachability and how this information reroutes traffic in the event of a fault. E...

The scale and the distributed nature of the Internet make it difficult for Internet Service Providers and end-users alike to identify the causes of failures that affect their networking services. Among the variety of problems that can occur, failures on the IP forwarding path are the hardest to troubleshoot. Under these circumstances, a number of network failure diagnosis techniques have emerge...

Mobile Ad-hoc Networks (MANETs) are widely used self-configured networks without any centralized infrastructure support. In MANET every node has to act as a router and has the responsibilities to discover a route and the node mobility makes unpredictable topology changes. The rapid change of network topology causes the link failure thereby increasing the network traffic and wasting the energy c...

We prove a shape theorem for rotor-router aggregation on the comb, for a specific initial rotor configuration and clockwise rotor sequence for all vertices. Furthermore, as an application of rotor-router walks, we describe the harmonic measure of the rotor-router aggregate and related shapes, which is useful in the study of other growth models on the comb. We also identify the shape for which t...