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Optical Network Control: Architecture, Protocols, and Standards by Debanjan Saha, Bala Rajagopalan, Greg Bernstein

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12.2. Interdomain Control Requirements

There are several reasons why a large network may be partitioned into domains. In each application, there are specific requirements on signaling and routing across interdomain interfaces. In this section, we explore these issues.

12.2.1. Scalability

As networks grow, the scalability of the control plane becomes an issue. Specifically, the complexity of transmission, storage, and processing of routing information increases with the size of the network. It therefore becomes necessary to partition a carrier's network into multiple domains between which the flow of routing information is limited in some fashion. This reduces the amount of information exchanged across the network, and reduces the convergence ...

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