How Can I ping from Router 0 to Router 3 by using Loopback 0 8.8.8.4(which i set in Router 3)

[Oz1]

Hi everyone,

I have a quick question on Nat Translation.I want to ping From Router 0 to Router 3 by using loopback08.8.8.4.However, I configured the Router 2 as a NAT.

But I want to ping From Router 0 to Router 3 by crossing Router 2..(When I ping with router 1 which has loopback0 8.8.8.8 it's successful. But when I try to ping with Router 3 the result is 0/5 percent. Just wanna know is there anything else I need add to Router 2.(The packet tracer file is attached already hope someone can help me out )thanks!

[Deepak Kumar]

Hi,

I need some information from your side. 

1. How to NAT configured on your R2 and R3 router?

2. Share the routing table from R1 and R3

Regards,

Deepak Kumar

[Oz1]

Network Address 202.120.8.0/28

Router 0 (Fa0/0)= 202.120.8.1 255.255.255.240

Router 1 (Fa0/0) = 202.120.8.3 255.255.255.240

Router 2 (Fa0/0) = 202.120.8.2 255.255.255.240

Network Address 172.12.12.0/30

Router 2 (Fa0/1) 172.12.12.1 255.255.255.252

Router 3 (Fa0/0)= 172.12.12.2 255.255.255.252

Router 2 is the NAT router

Router 1 loopback0  8.8.8.8  255.255.255.240

Router 3 loopback0  8.8.8.4  255.255.255.240

So, i want to ping 8.8.8.4 from Router 0

I have tried 8.8.8.8 it works (Router 1)

but when i try with 8.8.8.4 it doesnot work (Maybe something wrong with Nat router (Router 2 ))

The image file is attached....

[Deepak Kumar]

Hi,

Kindly share the lab file. Can you share the routing table from R1, R3 and nat configuration from R3?

Regards,

Deepak Kumar

[Georg Pauwen]

Hello,

post the Packet Tracer project file. Save the project as .pkt, then rename it to .jpg. The system doesn't let you post .pkt files, but it works with .jpg files...

[Deepak Kumar · Accepted solution]

Hi,

I found the issue in your routing configuration on R1 and R0. Your current configuration is like:

ip classless
ip route 0.0.0.0 0.0.0.0 FastEthernet0/0

But here your FastEthernet0/0 port is connected to an L2 switch (no routing). So traffic is going out on FastEthernet but after that, no route will route so traffic goes dropped. 

I added a route on R0 and R1

ip route 8.8.8.4 255.255.255.255 202.120.8.2

It is working fine. 

Regards,

Deepak Kumar