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CCNA Routing and Switching Portable Command Guide: Enhanced Interior Gateway Routing Protocol (EIGRP)

Sample Chapter is provided courtesy of Cisco Press.
Date: Jun 24, 2013.

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Chapter Information

Chapter Description

The excerpt from The CCNA Routing and Switching Portable Command Guide summarizes all CCNA certification-level Cisco IOS® Software commands, keywords, command arguments, and associated prompts for topics related to the Enhanced Interior Gateway Routing Protocol (EIGRP).

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CCNA Routing and Switching Portable Command Guide, 3rd Edition

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Bandwidth Use

Router(config)#interface serial 0/0/0

Enters interface configuration mode.

Router(config-if) #bandwidth 256

Sets the bandwidth of this interface to 256 kilobits to allow EIGRP to make a better metric calculation.

Router(config-if)#ip bandwidth-percent eigrp 50 100

Configures the percentage of bandwidth that may be used by EIGRP on an interface.

50 is the EIGRP autonomous system number.

100 is the percentage value.

100% * 256 = 256 kbps.

Authentication

`Router(config)#interface serial 0/0/0`	Enters interface configuration mode.
`Router(config-if)#ip authentication mode eigrp 100 md5`	Enables Message Digest 5 algorithm (MD5) authentication in EIGRP packets over the interface.
`Router(config-if)#ip authentication key-chain eigrp 100 romeo`	Enables authentication of EIGRP packets. romeo is the name of the key chain.
`Router(config-if)#exit`	Returns to global configuration mode.
`Router(config)#key chain romeo`	Identifies a key chain. The name must match the name configured in interface configuration mode above.
`Router(config-keychain)#key 1`	Identifies the key number.
	NOTE The range of keys is from 0 to 2147483647. The key identification numbers do not need to be consecutive. At least 1 key must be defined on a key chain.
`Router(config-keychain-key)#key-string shakespeare`	Identifies the key string.
	NOTE The string can contain from 1 to 80 uppercase and lowercase alphanumeric characters, except that the first character cannot be a number.
`Router(config-keychain-key)#accept-lifetime start-time {infinite \| end-time \| duration seconds}`	Optionally specifies the period during which the key can be received.
	NOTE The default start time and the earliest acceptable date is January 1, 1993. The default end time is an infinite period.
`Router(config-keychain-key)#send-lifetime start-time {infinite \| end-time \| duration seconds}`	Optionally specifies the period during which the key can be sent.
	NOTE The default start time and the earliest acceptable date is January 1, 1993. The default end time is an infinite period.

4. Verifying EIGRP / Troubleshooting EIGRP | Next Section Previous Section

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