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

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Name

isis password — interface

Synopsis

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

Configures

The authentication password for IS-IS routing

Default

None

Description

This command sets the authentication password for IS-IS routing for the interface. All IS-IS communication to other routers through this interface must be authenticated with this password. However, like other password settings for IS-IS, this password is sent out in clear-text, providing little security. The level-1 and level-2 keywords are optional; they allow separate passwords to be applied to each level. If no level is specified, level-1 is used.

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