Cisco Systems ME 3400 Configuring EIGRP Route Authentication

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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide

OL-9639-06

Chapter 35 Configuring IP Unicast Routing

Configuring EIGRP

Use the no forms of these commands to disable the feature or return the setting to the default value.

Configuring EIGRP Route Authentication

EIGRP route authentication provides MD5 authentication of routing updates from the EIGRP routing

protocol to prevent the introduction of unauthorized or false routing messages from unapproved sources.

Beginning in privileged EXEC mode, follow these steps to enable authentication:

Step 6 ip hello-interval eigrp autonomous-system-number

seconds (Optional) Change the hello time interval for an EIGRP

routing process. The range is 1 to 65535 seconds. The

default is 60 seconds for low-speed NBMA networks and 5

seconds for all other networks.

Step 7 ip hold-time eigrp autonomous-system-number

seconds (Optional) Change the hold time interval for an EIGRP

routing process. The range is 1 to 65535 seconds. The

default is 180 seconds for low-speed NBMA networks and

15 seconds for all other networks.

Caution Do not adjust the hold time without consulting

Cisco technical support.

Step 8 no ip split-horizon eigrp autonomous-system-number (Optional) Disable split horizon to allow route information

to be advertised by a router out any interface from which that

information originated.

Step 9 end Return to privileged EXEC mode.

Step 10 show ip eigrp interface Display which interfaces EIGRP is active on and

information about EIGRP relating to those interfaces.

Step 11 copy running-config startup-config (Optional) Save your entries in the configuration file.

Command Purpose

Step 1 configure terminal Enter global configuration mode.

Step 2 interface interface-id Enter interface configuration mode, and specify the

Layer 3 interface to configure.

Step 3 no shutdown Enable the interface if necessary. By default, UNIs and

ENIs are disabled and NNIs are enabled.

Step 4 ip authentication mode eigrp autonomous-system md5 Enable MD5 authentication in IP EIGRP packets.

Step 5 ip authentication key-chain eigrp autonomous-system

key-chain Enable authentication of IP EIGRP packets.

Step 6 exit Return to global configuration mode.

Step 7 key chain name-of-chain Identify a key chain and enter key-chain configuration

mode. Match the name configured in Step 4.

Step 8 key number In key-chain configuration mode, identify the key

number.