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

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Name

isis authentication key-chain — interface

Synopsis

isis authentication key-chain name [level-1 | level-2]
no isis authentication key-chain name [level-1 | level-2]

Configures

Authentication for IS-IS routing

Default

None

Description

This command enables authentication for IS-IS routing on an interface. The name of the key-chain specifies the group of valid keys. The optional keywords level-1 and level-2 specify that packets from level-1 or level-2 routers must be authenticated.

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