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Nexus Switching 2nd Edition

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Example 3-20. Configuring a Keychain<br />

Click here to view code image<br />

Figure 3-3. EIGRP Authentication<br />

Congo(config)# key chain <strong>nexus</strong><br />

Congo(config-keychain)# key 1<br />

Congo(config-keychain-key)# key-string <strong>nexus</strong><br />

Now that a key exists, the next step is to configure the routing protocol, EIGRP in this case,<br />

to enable authentication <strong>and</strong> to use the keychain, as shown in Example 3-21. This step is<br />

completed under the address-family configuration. It is necessary to specify an encryption<br />

mechanism, MD5, <strong>and</strong> configure the keychain to use.<br />

Note<br />

The use of address-family comm<strong>and</strong>s provides the ability to group protocol-specific<br />

attributes such as stub, authentication, <strong>and</strong> redistribution. This flexibility allows for

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