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Cisco IOS in a Nutshell, 2nd Edition by James Boney

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Name

isis priority — interface

Synopsis

isis priority priority [{level-1 | level-2}]
no isis priority

Configures

A priority value for the interface for IS-IS routing

Default

64

Description

This command allows you to set the router’s priority in an IS-IS network. The priority is used to determine which routers become the designated router (DR) and the backup designated router (BDR). The priority can range from 0 to 127; 127 is the highest. The optional keywords level-1 and level-2 allow you to set a different priority for each level; otherwise the priority value applies to both levels.

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