Integrated IS-IS Commands for CCNP BSCI

Contents

  1. ISO Network Entity Title (NET)
  2. Rules for Creating a NET
  3. Examples of NETs: Cisco Implementation
  4. Basic IS-IS Configuration
  5. Neighbors and Timers
  6. Election of the Designated IS (DIS)
  7. Rules for IS-IS Adjacencies
  8. Routing Metrics
  9. Wide Metrics
  10. Manual Summarization
  11. Injecting Default Routes
  12. Defining Router Types
  13. Verifying Integrated IS-IS Routing
  14. Configuration Example: Multi-Area IS-IS

Chapter Description

This chapter provides information and commands concerning a wide range of Intermediate System-to-Intermediate System (IS-IS) topics related to the CCNP BSCI exam.

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Election of the Designated IS (DIS)

Router(config)#interface fastethernet 0/0

Enters interface configuration mode.

Router(config-if)#isis priority 100

Changes the priority to 100 for the DIS election process.

NOTE

DIS priority is a number that ranges from 0 to 127. The Cisco default is 64. The highest priority wins the DIS election. If all priorities are the same, the numerically highest MAC address wins the election. There is no way to make a router ineligible from being the DIS—there is no IS-IS equivalent to the OSPF priority 0 option.

NOTE

There is no backup DIS.
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