While reviewing the router configurations, note the use of both static and dynamic routes in the topology. Step 2: Test connectivity between computers and the web server. Click the Internet cloud, then ISP. Step 5: Test connectivity to the web server. You might also like More from author. Prev Next. C4 says 2 years ago. Leave A Reply. Sign in. If authentication had failed, line protocol would be down. It's really the only new information from this output as we walk you through all of the key sections.
We really haven't spent much time looking at debugs at all in any of our discussions. But here, it's a great way for us to see that challenge and response process that is happening. Look at the beginning of this output, they're showing us that our interface is up right? We're up at layer 1, we're not up at layer 2. We're not up at layer 2 until we see line protocol on the interface is up. So right now, we just have that physical connectivity.
Now we are going through the authentication process, and which sub protocol for PPP is responsible for that? So we're in the link control protocol phase right now of establishing our connection for PPP, but we have to authenticate right now.
Let's look down at this. We have multiple challenges, we have multiple challenges. Why multiple challenges here? I notice an O and an I for these multiple challenges, what are those about, what's happening? RouterA x Feb 23 We got an out, we got an in and this is that two-way CHAP, both sides are challenging each other.
So it's a two bidirectional three-step process that's the first, can see the challenge. Here's the cool thing about that. You might be able to detect like a case insensitivity problem here. If you're not succeeding, you could look at the character strings and you could go, well, wait a minute those don't match up, right? You could see maybe one person lowercased an X or a Y or an R, something that is more likely to occur in a real-world network.
We've got our challenge, you can see the response, it's the answer, the mathematical answer to the challenge and then, I can see SUCCESS on both sides.
On the DCE side of the link configure the clock rate with the below command under the line config for the serial interface. If the command returns an error then you are on the DTE side and the other router supplies the clock rate. Next lets create a username and password on each router. Use the following commands on each router to configure this. This can be a little tricky because we are creating a username for the other end to authenticate so the username is the reverse of what you'd think see screenshot.
Below is the config for both routers. Simple and easy to follow. Well done. Also, I have noticed in Packet Tracer that it doesn't always like using chap unless you add pap to it. For example:. This could be caused by the scenarios I was using though so if it works without adding pap then all the better. Refer to Cisco Technical Tips Conventions for more information on document conventions.
This is accomplished on Ethernet interfaces by referencing the already unique bit MAC address, and reformatting that value to match the EUI specification.
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