Summary
This chapter presents various case studies to elaborate on various network design issues when IS-IS is deployed as an IGP. The chapter starts by reviewing two migration scenarios that involve making changes in existing IS-IS configurations. The first is concerned with migration of IS-IS areas from one area ID to another, and the second deals with migration from narrow to wide metrics.
Next, IS-IS configurations are reviewed for point-to-point links and for NBMA transport deployed in ISP environments. A great amount of time is dedicated to issues relating to deploying IS-IS in NBMA environments with highly meshed PVCs. Common configuration problems and solutions are reviewed. The reviews indicate the best model for NBMA links in IS-IS ...
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