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

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Name

ip nhrp authentication — interface

Synopsis

ip nhrp authentication string
no ip nhrp authentication

Configures

Authentication for NHRP

Default

Disabled

Description

This command sets an authentication string for Next-Hop Resolution Protocol (NHRP ). By default, no authentication is performed. The string can be up to eight characters in length. All routers within the NBMA (Non-Broadcast Multi-Access) must use the same authentication string.

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