Mythodea Ost Wiki: TrudyTeske237

When you earned your CCNA, you believed you learned everything there is to know about RIP. To discover more, you are able to view at [http://www.yangjiabbs.com/showthread.php?tid=9701 Weblog And Ping Does It-work?]. Close, but not rather There are some additional specifics you want to know to pass the BSCI exam and get one particular step closer to the CCNP exam, and 1 of those requires RIP update packet authentication. Youre familiar with some benefits of employing RIPv2 more than RIPv1, assistance for VLSM chief amongst them. Learn more on our affiliated website by clicking [http://support.sphericit.com/entries/51294379-How-To-Market-Your-Home-based-Travel-Business contact roland fraiser]. But one particular advantage that you happen to be not introduced to in your CCNA scientific studies is the capacity 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 generates the hash value for the password that will be contained in the update packets. Not only need to the routers agree on the password, they must agree on the authentication technique. If 1 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 great command for troubleshooting authenticated updates. R1, R2, and R3 are operating RIP more than a frame relay cloud. Learn more on a related portfolio by clicking [http://avqp.info/blogs/all-inclusive-travel-planning/ All inclusive travel planning History of the World]. Here is how RIP authentication would be configured on these 3 routers. R1#conf t R1config#key chain RIP The key chain can have any name. R1config-keychain#crucial 1 Key chains can have multiple keys. Number them carefully when using multiples. R1config-keychain-key#important-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#important chain RIP R2config-keychain#crucial 1 R2config-keychain-essential#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#crucial chain RIP R3config-keychain#key 1 R3config-keychain-key#crucial-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 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.../eight by way of ... If you have an opinion about video, you will probably desire to learn about [http://www.baby24.lv/ru/forum/topic-47419 understandable]. 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 neighborhood router is set for clear-text. You will also see this message if the password itself is incorrect. 3d04h RIP ignored v2 packet from 150.1.1.3 invalid authentication "Debug ip rip" may be a simple command as compared to the debugs for other protocols. but it really is also a extremely powerful debug. Begin making use of debugs as early as feasible in your Cisco scientific studies to find out how router commands really operate.

Mythodea Ost Wiki : TrudyTeske237