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A dynamic on-line path computation algorithm for VNT configuration in GMPLS controlled multi-layer (Ethernet/WSON) network

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4 Author(s)
Bukva, A. ; Centre Tecnol. de Telecomunicacions de Catalunya (CTTC), Castelldefels, Spain ; Casellas, R. ; Martinez, R. ; Munoz, R.

In this paper we propose a dynamic multi-layer path computation algorithm which favors the re-usage of FA LSPs (Forwarding Adjacency Label Switched Path) and virtual links over a new LSP establishment. To evaluate the algorithm, we explore several approaches for the dynamic configuration of the Virtual Network Topology (VNT) within a multi-layer network (Connection - Oriented Ethernet transport over a Wavelength Switched Optical Network) controlled by a unified GMPLS control plane. Specifically, three VNT approaches are compared: the virtual approach, where some lambda FA LSPs are pre-computed but not established (i.e., virtual TE links), the semi-dynamic approach, where a specific set of lambda FA LSPs is pre-established and advertised as Ethernet TE links (i.e., FA TE links) and the dynamic approach, where there are neither pre-established nor pre-computed lambda FA LSPs.

Published in:

High Performance Switching and Routing (HPSR), 2011 IEEE 12th International Conference on

Date of Conference:

4-6 July 2011