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

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Name

ip authentication — interface

Synopsis

ip authentication key-chain eigrp as-number key-chain
no ip authentication key-chain eigrp as-number key-chain

ip authentication mode eigrp as-number md5
no ip authentication mode eigrp as-number md5

Configures

Authentication of EIGRP packets

Default

None

Description

The ip authentication key-chain command defines the key chain to be used for authenticating EIGRP packets. It is used with the ip authentication mode eigrp command, which applies the key chain to the correct EIGRP process. Key chains are defined with the global key chain command.

as-number

The EIGRP process to which this key applies.

key-chain

The name of an EIGRP key chain.

Example

interface ethernet0
  ip authentication key-chain eigrp 100 key1
  ip authentication mode eigrp 100 md5

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