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MPLS and Next-Generation Networks: Foundations for NGN and Enterprise Virtualization by Azhar Sayeed, Monique Morrow

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Chapter 8. Traffic Engineering

Traffic engineering is a familiar topic in the communications industry. Network operators have used traffic engineering on circuit infrastructure to evenly distribute traffic in the network. In ATM networks, PVCs are placed by operators such that network load is distributed evenly. Even dynamic routing protocols such as Private Network to Network Interface (PNNI) send topology and bandwidth information to the switches, and switches perform admission control when admitting virtual circuits (VC) in the network.

Today most networks are packet-networks, so they also use mesh connections for better redundancy and resilience. If failure occurs, reconvergence causes the IP routing devices to use the new paths in the network. ...

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