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I have set up a network with 3 offices on 3 different subnets.

File available at, https://github.com/turntheairblue/packetTracer

enter image description here

Router configuration is as follows,

R1 - Router enter image description here

R2 - Router enter image description here

R3 - Router enter image description here

ISP - Router enter image description here

I have fully configured Office 1 as labeled in the picture below. Offices 2 and 3 are not fully configured yet, only the routers are configured.

I'm using the laptop in Office 1 to ping each router. I can ping all devices in Office 1 without any dropped packets. I can ping the 172.16.32.1 gateway on the Office 1 router without any dropped packets. I can ping 10.0.0.1 on the Office 1 router without any dropped packets.

Here is the issue, when I ping 10.0.0.2, 11.0.0.2 and 12.0.0.2 on the ISP router, I get 1 reply and 3 dropped packets for each address.

When I ping 11.0.0.1 and 12.0.0.1 I get no replies.

Another thing, if I shut off the 11.0.0.2 and 12.0.0.2 interfaces on the ISP router I can get 4 replies from the 10.0.0.2 interface.

I can't seem to figure out what the cause of this is? Is it something to with my IP addressing scheme? I'm fairly new to networking in general, I'm assuming I have made a noob mistake somewhere along the line!!!

  • You need to edit your question to include the router configurations. We cannot simply guess what is incorrectly configured. – Ron Maupin May 1 '18 at 9:35
  • Hi Ron, thanks for the reply. I have uploaded the file to gitHub. github.com/turntheairblue/packetTracer – FacePalmProgramming May 1 '18 at 10:42
  • No. Edit your question with the configurations. Paste the text of the configurations into the question, and use the Preformatted-text option ({}). There are many people here that do not have Packet Tracer, but we need to see the configurations. – Ron Maupin May 1 '18 at 10:44
  • Ok, I have added the configuration of each router so far. – FacePalmProgramming May 1 '18 at 12:44
  • Please, never ever use images for text. Please paste the text into the question, and use the Preformatted-text option ({}). Show the configurations in the terminal (show running configuration), copy the text, and paste it into the question. – Ron Maupin May 1 '18 at 12:52
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It appears that you have not used the no auto-summary command under your router rip configuration. Without that command, RIP assumes that all addressing is classful. It doesn't matter that you have subnetted the 172.16.0.0/16 network; each router assumes that it is directly connected to that network, so it will not route traffic correctly.

  • Great, thanks for that! I'm sorry about using screenshots but I'm running packet tracer using WineSkin for Mac. I can't copy and paste text because of this. – FacePalmProgramming May 1 '18 at 13:11
  • You can. Others do that here with Packet Tracer. I don't have it, so I can't give you exact steps, but people do it all the time. – Ron Maupin May 1 '18 at 13:16
  • Should I use no auto-summary on all four routers? – FacePalmProgramming May 1 '18 at 13:16
  • Yes. Classful routing is dead. You should use that for RIP, IGRP, and EIGRP. – Ron Maupin May 1 '18 at 13:17
  • Great, thanks for your help! Really appreciate it. I can see an option to copy and paste in Packet Tracer CLI now!!! Don't know how I missed it the first time!!! I was trying to copy using 'cmd c' on the mac. – FacePalmProgramming May 1 '18 at 13:23

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