Abstract

Shared risk link groups (SRLGs) have been defined and implemented in many network planning tools and routing protocols. A single SRLG represents one potential failure, and a large service provider’s network could easily contain tens of thousands of potential failures. The greater the number of SRLGs, the more difficult it is to attain good performance from planning tools (like routers) whose computations are dependent on the number of SRLGs. For many routing protocols using SRLG information, the situation becomes even worse, because a routing protocol may have space constraints to hold a limited number of SRLGs. These issues create a challenge to optimize the SRLG calculations such that the SRLG-related functions are not impacted or the impacts on the SRLG-related functions are limited. This paper takes a closer look at the SRLG optimization issue and identifies the facts/observations of SRLGs. Then we propose algorithms for how to reduce the number of SRLGs for different applications based on our observations.

©2012 Optical Society of America

k-Connected Network Partitioning Under Shared Risk Link Groups

M. Masud Hasan, Farid Farahmand, and Jason P. Jue
J. Opt. Commun. Netw. 7(8) 695-706 (2015)

Backup Reprovisioning After Shared Risk Link Group (SRLG) Failures in WDM Mesh Networks

Xu Shao, Yong Kee Yeo, Yuebin Bai, Jian Chen, Luying Zhou, and Lek Heng Ngoh
J. Opt. Commun. Netw. 2(8) 587-599 (2010)

Best Effort SRLG Failure Protection for Optical WDM Networks

Xu Shao, Yuebin Bai, Xiaofei Cheng, Yong-Kee Yeo, Luying Zhou, and Lek Heng Ngoh
J. Opt. Commun. Netw. 3(9) 739-749 (2011)

Design and Dimensioning of Logical Survivable Topologies Against Multiple Failures

Brigitte Jaumard and Hai Anh Hoang
J. Opt. Commun. Netw. 5(1) 23-36 (2013)

SRLG-Aware Topology Aggregation for Survivable Multi-domain Optical Networks

Chengyi Gao, Yi Zhu, and Jason P. Jue
J. Opt. Commun. Netw. 5(11) 1145-1156 (2013)