CCNP BSCI Portable Command Guide

CHAPTER 4. Integrated IS-IS

This chapter provides information and commands concerning the following Intermediate System-to-Intermediate System (IS-IS) topics:

• ISO Network Entity Title (NET)

• Rules for creating a NET

• Examples of NETs: Cisco implementation

• Basic IS-IS configuration

• Neighbors and timers

• Election of the designated IS (DIS)

• Rules for IS-IS adjacencies

• Routing metrics

• Wide metrics

• Manual summarization

• Injecting default routes

• Defining router types

• Verifying integrated IS-IS routing

• Configuration example: Multi-area IS-IS

ISO Network Entity Title (NET)

Figure 4-1 shows three of the different formats that an ISO NET can take:

(a) An 8-octet area IS/system ID format

(b) An OSI NSAP format

(c) A GOSIP NSAP format ...