10.1. Introduction
Today, routing a connection in a traditional optical transport network involves a number of steps. Many of these involve manual actions, and hence painstaking and error-prone. Also, the routing infrastructure is predominantly centralized. A centralized Element or Network Management System (EMS/NMS) acts as the repository of the network topology database. The entries in the topology database are often entered and updated manually. Routers are computed automatically, but with manual intervention. There is a strong desire among the network operators to transition from this centralized and manual approach to a more distributed and automated routing system. In this chapter, we discuss a distributed routing architecture for optical ...
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