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This chapter is from the book

This chapter is from the book

Defining Router Types

Router(config)#router isis

Enables the IS-IS routing process.

Router(config-router)#is-type level-1

The router will perform only Level 1 routing (intra-area or within a single area).

Router(config-router)#is-type level-1-2

The router will perform both Level 1 routing (intra-area) and Level 2 routing (inter-area).

Router(config-router)#is-type level-2-only

The router will perform only Level 2 routing. This router will not communicate with Level 1 routers in its own area.

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