Cisco Systems 3750E manual Configuring Eigrp Route Authentication, Show ip eigrp interface, 38-41

Chapter 38 Configuring IP Unicast Routing

Configuring EIGRP

	Command	Purpose
Step 5
	ip hello-interval eigrp autonomous-system-number	(Optional) Change the hello time interval for an EIGRP
	seconds	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 6
	ip hold-time eigrp autonomous-system-number	(Optional) Change the hold time interval for an EIGRP
	seconds	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 7
	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 8
	end	Return to privileged EXEC mode.
Step 9
	show ip eigrp interface	Display which interfaces EIGRP is active on and
		information about EIGRP relating to those interfaces.
Step 10
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

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:

	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
	ip authentication mode eigrp autonomous-systemmd5	Enable MD5 authentication in IP EIGRP packets.
Step 4
	ip authentication key-chain eigrp autonomous-system	Enable authentication of IP EIGRP packets.
	key-chain
Step 5
	exit	Return to global configuration mode.
Step 6
	key chain name-of-chain	Identify a key chain and enter key-chain configuration
		mode. Match the name configured in Step 4.
Step 7
	key number	In key-chain configuration mode, identify the key
		number.
Step 8
	key-string text	In key-chain key configuration mode, identify the key
		string.
	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02			38-41