Networking

Effects of Outdated Control Information in Control-Plane-Enabled Optical Networks With Path Protection

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Executive Summary

New signaling suites for a distributed control plane in Wavelength Division Multiplexing (WDM) networks, such as Generalized MultiProtocol Label Switching (GMPLS) and Automatic Switched Optical Networks (ASON), allow one to cope with the increasing variability of traffic patterns to be supported by operators by providing a means to dynamically set up and release connections. The dissemination of link-state information [usually provided by routing protocols such as Open-Shortest-Path-First Traffic Engineering (OSPF-TE)] is essential in this kind of control-plane enabled network: in particular, this information has to be continuously updated to allow routing algorithms to efficiently carry out the path computation.

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