Juniper Lab-1: How To Install Juniper MX in GNS3

Step 1: Click -> Edit -> Preferences

Then Click Qemu VMs

step 2: Click New Step 3: select Run This Qemu VM on the GNS3 VM step 4: Press Next

Step 5: Give a Name Link vMX Step 6: Press Next

Step 7: Select Qemu binary (/usr/bin/qemu-system-x86_64) step 4 : RAM : 1024 MB then press Next

Step 8 and 9: Console Type telnet Then Press Next

step 11: Click New Image step 12: Browse The vmx image file and

Next, choose your image file. By default, these will be called “jinstall-vmx-<version>-domesting.img”.then click finish

step 14 and 15 : select vMX and Click edit

step 16,17,: the newly created VM, set assign it to the Routers category, and make sure it’s set to use 1GB RAM, 1 “vCPU”, and telnet also select symbol if you have.

step 18,19,20,21: For the network settings, I’ve assigned it 12 adapters.
g-0/0/0 = the management interface (fxp0), Name Format ge-0/0/{0}.

Here are what your final settings should look like, in GNS3:

When we start up one of these legacy images, the login is “root” with no password. Now, before I proceed, there something you need to be aware of: Not all the pre-release single-VM images of vMX had the virtual FP enabled. Here is what you WANT to see, after the vMX instance loads:

If that statement isn’t there, don’t worry. You can manually enable it by running this:

Reboot the image, and then it will be enabled.

Something else we know: Even though the legacy vMX image boots up rather quickly, the virtual FP part of it does NOT. You really need to give it an extra 2-3 minutes, after you see the login prompt, so that everything fully loads up. Here is what you’ll see, if you do not wait:

You may think that looks fine, but the virtual PIC 0 is missing, which means none of the gigabit ethernet interfaces will ever be present. Once you wait an extra 2-3 minutes, here’s the output we really want to see: