Cisco CCNP / BSCI Exam Tutorial: RIP Update Packet Authentication
When you earned your CCNA, you thought you learned everything there is to know about RIP. Close, but not quite! There are some additional details you need to know to pass the BSCI exam and get one step closer to the CCNP exam, and one of those involves RIP update packet authentication.
You’re familiar with some advantages of using RIPv2 over RIPv1, support for VLSM chief among them. But one advantage that you’re not introduced to in your CCNA studies is the ability 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 anyone who can pick a packet off the wire. If you’re going to go to the trouble of configuring update authentication, you should 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 must the routers agree on the password, they must agree on the authentication method. If one router sends an MD5-hashed password to...
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