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When you earned your CCNA, you thought you learned everything there is to know about RIP. Close, but not very! There are some added details you need to know to pass the BSCI exam and get one particular step closer to the CCNP exam, and one of these entails RIP update packet authentication. You happen to be familiar with some positive aspects of making use of RIPv2 more than RIPv1, assistance for VLSM chief among them. But one advantage that youre not introduced to in your CCNA scientific studies is the potential to configure routing update packet authentication. You have two options, clear text and MD5. Clear text is just that - a clear text password that is visible by anybody who can choose a packet off the wire. If you happen to be going to go to the trouble of configuring update authentication, you must use MD5. The MD stands for Message Digest, and this is the algorithm that produces the hash value for the password that will be contained in the update packets. Not only have to the routers agree on the password, they need to agree on the authentication technique. If a single router sends an MD5-hashed password to one more router that is configured for clear-text authentication, the update will not be accepted. Browsing To [http://asra.us/showthread.php?tid=179344 www.meetperrybelcher.wix.com/perry-belcher] seemingly provides suggestions you could use with your uncle. To study more, please check-out: [http://the-free-world.org/members/jaguarseed95/activity/241260/ perry belcher resources]. debug ip rip is a wonderful command for troubleshooting authenticated updates. R1, R2, and R3 are operating RIP more than a frame relay cloud. This powerful [http://www.blueglobere.com/blog/view/395935/how-to-select-a-domain go here] portfolio has limitless offensive lessons for where to think over this belief. Right here is how RIP authentication would be configured on these 3 routers. R1#conf t R1config#essential chain RIP < The key chain can have any name. R1config-keychain#key 1 < Key chains can have multiple keys. Number them carefully when using multiples. R1config-keychain-important#crucial-string CISCO < This is the text string the key will use for authentication. R1config#int s0 R1config-if#ip rip authentication mode text < The interface will use clear-text mode. R1config-if#ip rip authentication crucial-chain RIP < The interface is using key chain RIP, configured earlier. R2#conf t R2config#essential chain RIP R2config-keychain#essential 1 R2config-keychain-key#key-string CISCO R2config#int s0.123 R2config-subif#ip rip authentication mode text R2config-subif#ip rip authentication important-chain RIP R3#conf t R3config#important chain RIP R3config-keychain#important 1 R3config-keychain-key#key-string CISCO R3config#int s0.31 R3config-subif#ip rip authentication mode text R3config-subif#ip rip authentication essential-chain RIP To use MD5 authentication rather than clear-text, basically replace the word text in the ip rip authentication mode command with md5. Heres what a effectively authentication RIPv2 packet looks like, courtesy of debug ip rip. Clear-text authentication is in effect and the password is cisco. 3d04h: RIP: received packet with text authentication cisco 3d04h: RIP: received v2 update from 150.1.1.3 on Ethernet0 3d04h: one hundred.../eight via ... in 1 hops 3d04h: 150.1.2./24 by means of ... in 1 hops Heres what it looks like when the remote device is set for MD5 authentication and the local router is set for clear-text. You will also see this message if the password itself is incorrect. 3d04h: RIP: ignored v2 packet from 150.1.1.three invalid authentication Debug ip rip may be a basic command as compared to the debugs for other protocols. but it really is also a really strong debug. Start off employing debugs as early as attainable in your Cisco reports to discover how router commands really function!. Be taught more on this partner portfolio by navigating to [http://www.purevolume.com/anklemodem64/posts/9388138/Would+You+Like+Adwords+Conclusive+Guide meet perry belcher].