authentication key-chain (EIGRP)

To enable authentication for the Enhanced Interior Gateway Routing Protocol (EIGRP) packets and to specify the set of keys that can be used on an interface, use the authentication key-chain command. To prevent authentication, use the no form of this command.

authentication key-chain name-of-chain

no authentication key-chain name-of-chain

Syntax Description

name-of-chain
Group of keys that are valid.

Command Default

No authentication is provided for EIGRP packets.

Command Modes

Router configuration mode
Address family configuration mode
Router VRF configuration mode

Command History

Release
Modification
5.0(3)N1(1)
This command was introduced.

Usage Guidelines

Set the authentication mode using the authentication mode command in VRF configuration mode. You must separately configure a key chain using the key-chain command to complete the authentication configuration for an interface.

This command requires the LAN Base Services license.

Examples

This example shows how to configure the interface to accept and send any key that belongs to the key-chain trees:

switch(config)# router eigrp 209
switch(config-router)# vrf red
switch(config-router-vrf)# authentication key-chain trees

Related Commands

Command
Description
authentication mode (EIGRP)
Sets the authentication mode for EIGRP in a VRF.
ip authentication key-chain eigrp
Enables authentication for EIGRP and specifies the set of keys that can be used on an interface.
key-chain
Creates a set of keys that can be used by an authentication method.
show ip eigrp
Displays EIGRP information.