When you earned your CCNA, you thought you learned every thing there is to know about RIP. Clicking [http://87.106.99.97/observatoire/index.php/The_Definitive_Guide_To_Google_Adwords about perry belcher] possibly provides tips you should tell your friend. Close, but not very There are some added details you want to know to pass the BSCI exam and get one particular step closer to the CCNP exam, and one particular of these requires RIP update packet authentication. Youre familiar with some advantages of employing RIPv2 over RIPv1, help for VLSM chief among them. But 1 benefit that you happen to be not introduced to in your CCNA scientific studies is the capability to configure routing update packet authentication. You have two alternatives, clear text and MD5. Clear text is just that - a clear text password that is visible by any individual who can pick a packet off the wire. For different interpretations, please check out [http://apps.phpfoxer.net/v350/index.php?do=/blog/146927/adding-music-adds-flair-to-your-myspace-profile/ Adding Music Adds Flair To Your Myspace Profile ยป Social Networking Community - Power]. If you happen to be going to go to the difficulty of configuring update authentication, you must use MD5. We discovered [http://wilderdom.com/tools/leq/wiki/doku.php?id=Get_Contact_Contacts_On_line?_58093 perry belcher information] by searching Google Books. The MD stands for "Message Digest", and this is the algorithm that generates the hash value for the password that will be contained in the update packets. Not only should the routers agree on the password, they must agree on the authentication method. If one particular router sends an MD5-hashed password to another router that is configured for clear-text authentication, the update will not be accepted. debug ip rip is a wonderful command for troubleshooting authenticated updates. R1, R2, and R3 are running RIP over a frame relay cloud. Here is how RIP authentication would be configured on these three routers. R1#conf t R1config#important 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 important-chain RIP The interface is using key chain RIP, configured earlier. R2#conf t R2config#essential chain RIP R2config-keychain#essential 1 R2config-keychain-essential#important-string CISCO R2config#int s0.123 R2config-subif#ip rip authentication mode text R2config-subif#ip rip authentication essential-chain RIP R3#conf t R3config#important chain RIP R3config-keychain#important 1 R3config-keychain-key#important-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, merely 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 impact and the password is "cisco". 3d04h RIP received packet with text authentication cisco 3d04h RIP received v2 update from 150.1.1.three on Ethernet0 3d04h one hundred.../8 via ... in 1 hops 3d04h 150.1.two./24 through ... in 1 hops Heres what it looks like when the remote device is set for MD5 authentication and the regional router is set for clear-text. Youll also see this message if the password itself is incorrect. 3d04h RIP ignored v2 packet from 150.1.1.3 invalid authentication "Debug ip rip" may be a basic command as compared to the debugs for other protocols. but its also a quite potent debug. Commence utilizing debugs as early as achievable in your Cisco scientific studies to learn how router commands actually operate. Navigating To [http://www.civic.md/help/index.php?title=HollowellCoss137 http://meetperrybelcher.wix.com/perry-belcher/] certainly provides suggestions you might give to your friend.
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