Building Resilient IP Networks

Chapter 5. Core Module

This chapter covers the following topics:

• Network Convergence in the Core

• OSPF Enhancements

• IS-IS Enhancements

• EIGRP Enhancements

• IP Event Dampening

• Multipath Routing

• MPLS Traffic Engineering

• Multicast Subsecond Convergence

In Chapter 3, “Fundamentals of IP Resilient Networks,” you learned about the functionalities of the different modules that make up the building blocks of a network. The core module deals mainly with IP routing issues; it is designed to move packets from the ingress to egress of the core in the shortest amount of time, and its design is often kept as simple as possible to achieve this objective. Features that are configured at the core may include those associated with the guaranteed ...