I started working on the IP addressing basics challenge but when I open the console for Linux 1 and the consol for Linux 2 and type in them ifconfig, I receive the exact same IP address from both devices 192.168.10.101 and I’m not sure how I’m supposed to troubleshoot this problem.
Hi @B_Alaeddin I would suggesting posting the screenshots when you have opened the consoles. A screenshot for Linux 1 and another one for Linux 2. Then we can try and see how we can help.
I’m also having this issue except with linux 4 and 5. 4 shows the same IP address as linux 1 and linux 5 doesn’t show any IP address. At least I hope at this point its a problem with the LAB and not myself.
Linux 1 IP is 192.168.10.101
Linux 4 says same thing
“Use the commands you learned in the guided exercise to map out the network and determine if there are any issues in the host configurations. When you are done mapping out the network, answer the questions in the Tasks tab.”
There are built-in (and hopefully obvious) flaws and you will use this information to answer questions on the Tasks tab 
You are not expected to fix anything, just map it all out, look for flaws, and answer questions about the network.
I managed to find the flaws, but I’m still not sure how I answered the questions correctly. Linix-1 and Linux-2 is set up correctly and can ping 192.168.100.1 and get a response, so it does exist, but only reachable through the router at 192.168.10.1. Simple enough. However, on question 4 it asks,
- A host cannot communicate with other local hosts in the network with the highest third octet. What is the IP of that host?
For some reason, the answer is 192.168.10.101 but that wouldn’t be a local host on that network as it can only be accessed remotely. Linux-4 has the same issue as Linux-3 which is the gateway is configured to a remote host, but only one is the answer. Is it because its attached to switch 2? Is it actually referring to Linux-1 because that would actually have an assigned IP? Its still not local to the highest octet network! and how is there not a static IP collision with all this?
And on question 3 it asks:
In the network with the lowest third octet, there is a host with an issue. What is the IP of the host that will not be able to reach other networks?
There’s 2 answers again, because neither Linux-3 nor Linux-4 can reach out to other networks since they both don’t ask 192.168.10.1 to get routed.
I get its a challenge, and it was, but I’m really not sure what the intended route was or what was meant to be gleamed here.
Apologies for any broken formatting I haven’t used forums in a long time
The goal is to understand that there are two networks and to be able to spot common issues like wrong IP and bad gateway.
I figured out the part I was missing. I understood there were supposed to be 2 networks, but since there wasn’t a single working host on the 192.168.100.0/24 network, it was hard to see it as a network at all.
The part that made it click was looking at the router config and seeing it had a static ip set for each ethernet port, so to switch1 it was one ip, but to switch2 it was another. I feel this exercise could be more clear. I feel I was more analyzing what the tasks were trying to ask me more than I was analyzing the network.
Do you think adding a part in the Guided Exercises where you look a the router would make the challenge more understandable?
That’s not a bad idea! The guided exercise talks a lot about figuring out a network’s architecture from the client’s POV, but not much about how the router settings are just as important and insightful to how a network functions, or is supposed to function. Since we’re doing it all in gns3, its possible to give that big picture overview of it all.
Plus it gives the opportunity to organically discover that “hey, this device has 2 ip addresses! One router can host multiple networks :OOOO” which is kinda covered in the next chapter conveniently enough.