Departmental Papers (ESE)

Abstract

With network components increasingly reliable, routing is playing an ever greater role in determining network reliability. This has spurred much activity in improving routing stability and reaction to failures, and rekindled interest in centralized routing solutions, at least within a single routing domain. Centralizing decisions eliminates uncertainty and many inconsistencies, and offers added flexibility in computing routes that meet different criteria. However, it also introduces new challenges; especially in reacting to failures where centralization can increase latency. This paper leverages the flexibility afforded by centralized routing to address these challenges. Specifically, we explore when and how standby backup forwarding options can be activated, while waiting for an update from the centralized server after the failure of an individual component (link or node). We provide analytical insight into the feasibility of such backups as a function of network structure, and quantify their computational complexity. We also develop an efficient heuristic reconciling protectability and performance, and demonstrate its effectiveness in a broad range of scenarios. The results should facilitate deployments of centralized routing solutions.

Document Type

Conference Paper

Date of this Version

12-10-2009

Comments

Copyright 2010 IEEE. Reprinted from:

Kin-Wah (Eric) Kwong , Lixin Gao, Roch A. Guérin , Zhi-Li Zhang. On the Feasibility and Efficacy of Protection Routing in IP Networks. Proceedings of the IEEE 2010 Conference on Computer Communications (INFOCOM 2010), San Diego, CA, March 2010

This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Pennsylvania's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

Keywords

network, routing, protection, standby

Share

COinS
 

Date Posted: 16 December 2009

This document has been peer reviewed.