Cisco CCNP / BCSI Exam Tutorial: Configuring EIGRP Packet Authentication

Configuring RIPv2 and EIGRP authentication with key chains can be tricky at initial, and the syntax is not specifically simple to remember. But for BSCI and CCNP exam good results, we've got to be in a position to carry out this task.

In a preceding tutorial, we saw how to configure RIPv2 packet authentication, with both clear-text and MD5 authentication schemes. For one more viewpoint, we recommend people glance at: [http://www.okttba.com/the-treadmill-senseis-guide-on-how-best-to-change-your-treadmill-belt.html The Treadmill Sensei’s guide on how best to change your treadmill belt  | okttba blog]. EIGRP authentication is considerably the exact same, and has the text and MD5 authentication choices as well. But EIGRP becoming EIGRP, the command just has to be a small far more detailed!

As with RIPv2, the authentication mode ought to be agreed upon by the EIGRP neighbors. If a single router's interface is configured for MD5 authentication and the remote router's interface is configured for text authentication, the adjacency will fail even if the two interfaces in question are configured to use the very same password.

We'll now configure link authentication on the adjacency more than an Ethernet segment. Under, you will see how to configure a important chain called EIGRP on each routers, use important quantity 1, and use the important-string BSCI. Run show essential chain on a router to see all crucial chains.

R2(config)#important chain EIGRP

R2(config-keychain)#crucial 1

R2(config-keychain-key)#important-string BSCI

R2#show crucial chain

Important-chain EIGRP:

crucial 1 -- text "BSCI"

accept lifetime (always valid) - (constantly valid) [valid now]

send lifetime (usually valid) - (usually valid) [valid now]

R3(config)#important chain EIGRP

R3(config-keychain)#essential 1

R3(config-keychain-important)#important-string BSCI

R3#show essential chain

Important-chain EIGRP:

essential 1 -- text "BSCI"

accept lifetime (usually valid) - (usually valid) [valid now]

send lifetime (always valid) - (often valid) [valid now]

The EIGRP command to apply the important chain is a bit of a discomfort to bear in mind, because the protocol and AS number is identified in the middle of the command, not the starting. Also note that two commands are required - one particular to name the essential chain, an additional to define the authentication mode in use.

R2(config)#interface ethernet0

R2(config-if)#ip authentication essential-chain eigrp 100 EIGRP

R2(config-if)#ip authentication mode eigrp one hundred md5

5d07h: %DUAL-five-NBRCHANGE: IP-EIGRP one hundred: Neighbor 172.12.23.three (Ethernet0) is down: keychain modified

R3(config)#interface ethernet0

R3(config-if)#ip authentication important-chain eigrp 100 EIGRP

R3(config-if)#ip authentication mode eigrp 100 md5

5d07h: %DUAL-5-NBRCHANGE: IP-EIGRP 100: Neighbor 172.12.23.2 (Ethernet0) is up:

As with RIPv2, the current adjacency was torn down when one side was configured with authentication. If the important chain is correctly defined and applied on each sides, the adjacency will come back up. Be taught further on the affiliated web resource by visiting [http://demo.phpfox.com/3.7.0/blog/5222/can-be-your-cars-brake-light-stuck/ Can Be Your Cars Brake Light Stuck? » Social Networking Community - Powered By PHPFox]. Usually run show ip eigrp neighbor to make sure the adjacency is present. Identify more on [http://canon-mcmillan.patch.com/groups/events/p/do-not-be-intimidated-by-the-brand-new-air-travel-rules clicky] by navigating to our stylish website. Discover the details of EIGRP key chains by configuring them on your house lab gear, and you'll be far more than prepared for BSCI exam achievement!. Browsing To [http://www.bonaverba.com/drupal/Drupal6.12/node/600814 How to Extend the Life of Your Treadmill | The Commodity Cosmos] certainly provides lessons you could give to your uncle.