How to configure EIGRP Authentication

Hello Hussein

Cisco commands are implemented using a specific hierarchy. When you type the command ip eigrp ?, the resulting commands all have to do with EIGRP and its functionality. They are limited to routing EIGRP and nothing else. However, authentication is a different entity and must be placed within a different category. This is why the commands fall under the ip authentication keywords even though the authentication is being configured for EIGRP. Anything under the ip authentication ? will belong to the authentication functionality of the router.

So by typing ip authentication mode eigrp AS_NUM md5 you are not configuring something specific to EIGRP but something specific to the authentication functionality of the router.

I hope this has been helpful!

Laz

4 Likes