# Co-spanning tree restoration mechanism for metro Ethernet switched networks

Co-spanning tree restoration mechanism for metro Ethernet switched networks Ethernet, a popular technology in IT industry, with high transmission rate, simple maintenance, and compatibility with different types of links was invented for local and small-scale computer networks. However, current spanning tree-based Ethernet protocols do not meet the requirements for metro Ethernet networks in terms of network resilience. One of the most important weaknesses is slow re-convergence time in the event of a link failure when a new spanning tree must be reconstructed to ensure the survivability of networks. In this paper, we propose a co-spanning tree restoration (CSTR) mechanism for metro Ethernet switched networks to handle the link failures. Upon failure of a link on the network, a distributed failure restoration protocol will be activated to reconstruct the damaged spanning tree using a $$co\text {-}tree$$ c o - t r e e link. We explain the details of the protocol, including advertisement tables and fundamental reconfiguration processes. In addition, we propose a simple and effective solution for a double link failure and develop an optional feature to control unnecessary topology changes. The simulated results of CSTR on different network topologies show its features of efficiency and quick recovery. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Photonic Network Communications Springer Journals

# Co-spanning tree restoration mechanism for metro Ethernet switched networks

, Volume 29 (1) – Oct 30, 2014
14 pages

/lp/springer_journal/co-spanning-tree-restoration-mechanism-for-metro-ethernet-switched-4i1Q1K9a8y
Publisher
Springer US
Subject
Computer Science; Computer Communication Networks; Electrical Engineering; Characterization and Evaluation of Materials
ISSN
1387-974X
eISSN
1572-8188
D.O.I.
10.1007/s11107-014-0477-8
Publisher site
See Article on Publisher Site

### Abstract

Ethernet, a popular technology in IT industry, with high transmission rate, simple maintenance, and compatibility with different types of links was invented for local and small-scale computer networks. However, current spanning tree-based Ethernet protocols do not meet the requirements for metro Ethernet networks in terms of network resilience. One of the most important weaknesses is slow re-convergence time in the event of a link failure when a new spanning tree must be reconstructed to ensure the survivability of networks. In this paper, we propose a co-spanning tree restoration (CSTR) mechanism for metro Ethernet switched networks to handle the link failures. Upon failure of a link on the network, a distributed failure restoration protocol will be activated to reconstruct the damaged spanning tree using a $$co\text {-}tree$$ c o - t r e e link. We explain the details of the protocol, including advertisement tables and fundamental reconfiguration processes. In addition, we propose a simple and effective solution for a double link failure and develop an optional feature to control unnecessary topology changes. The simulated results of CSTR on different network topologies show its features of efficiency and quick recovery.

### Journal

Photonic Network CommunicationsSpringer Journals

Published: Oct 30, 2014

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