Right-click the adapter "Microsoft Loopback Adapter" and select "Rename" Note: the "Network Connections" window opens Click "Finish" to close the "Add Hardware" screen Click "Next" to install the loopback adapter Select “Microsoft” and “Microsoft Loopback Adapter” under Manufacturer and Network Adapter respectively, then click "Next" Select “Network adapters” and click "Next" Select “Install the hardware that I manually select from a list (Advanced)” and click "Next" Note: the "Add Hardware Wizard" window opens Right-click "cmd.exe" (top of start bar menu) and select "run as Administrator" (Click "Yes" to confirm) Click the Windows Start button (bottom left) Note: We are creating and bridging a loopback adapter to be able to talk between physical PC and virtual GNS3 hosts Configure R1 to match the IP subnet of VMware NAT IP range on your PC.From an installation manual I wrote, I hope it helps you:.Change R1 GNS configuration and bound your GNS3 cloud to VM nat interface.Setup Network adapter in VMware for Ubuntu machine to be NAT.If you really want to simulate the scenario where Ubuntu VM and R1 router are connected to one subnet (let us call it Subnet1), and R2 is connected to your regular (LAN) subnet, then follow next scenario: Let us presume LAN segment is: 10.10.10.0/24 from now on.ĭisable firewall on Windows 7 machine if FW is on - this is what is blocking the communication when it comes to R2 to Win7 communication. Of course, configure Ubuntu workstation to have address range from your LAN segment. Ubuntu on VMware should use Bridged network (as we would like to use the same network as our GNS router does). I actually have run into lots questions so far and (assuming this is not off-topic) plan to create a series of posts after this.Ĭan I ask you why you connect your Ubuntu to MS loopback?Īnd the second thing, why is R1 that is connected to MS loopback network having IP address from your LAN IP range (10.10.10.170/24)? This will not work for sure. Why can't R1 and R2 see my real LAN? What am I missing here? Still for both R1 and R2, the ping on 10.10.10.167 (the regular ethernet adapter of the GNS3 host) and the loopback adapter 169.254.230.131 has no success. I've set the Gateway of last resort to 10.10.10.252 which is the actual default gateway for the real LAN which my GNS3 host is on. Sending 5, 100-byte ICMP Echos to 10.10.10.167, timeout is 2 seconds: The problem is that neither R1 nor R2 can ping the Windows 7 host (running GNS3) 10.10.10.167 as shown for R2 below (the console of R1 and R2 are basically the same). : 192.168.129.1Įthernet adapter VMware Network Adapter VMnet8: : 10.10.10.252Įthernet adapter VMware Network Adapter VMnet1: An nmap scan from this same host, with target set to its default gateway of 10.10.10.252 says that we have a Cisco router (but I don't have physical access to know what model it is). ipconfig shows that the Windows 7 host (running GNS3) has IP 10.10.10.167. R1 is connected to the Microsoft Loopback adapter (C1), and R2 is connected to the normal Ethernet adapter (C3) as shown in the topology below. The same host also runs a VMWare Ubuntu 10.0.04 guest. A single instance of GNS3 runs on a Windows 7 Enterprise host. LAN 1 is not connected to the internet and is completely wired Ethernet. The GNS3 network is connected to a real network, let's call it LAN 1. I am building a lab environment for CCNA training, using GNS3.
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