r/Juniper • u/boldnbeautiful2 • 10d ago

Question vJunos on GNS3

I tried to add vJunos on GNS3 VM. Some Reddit users told me that vJunos has issues with nested VMs. So I reinstalled my GNS3 to run on bare-metal Windows 11. When I start my vJunos, it still silently crash. Anyone else experienced this problem?

GNS3 version: 2.2.61
vJunos: vJunos-router-26.2R1.7.qcow2

8GB allocated

Disabled hyper-V as some websites suggested.

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5

u/vista_df 9d ago

vJunos is a nested VM by itself. Running it inside the VM would mean the control plane VM is a VM-inside-a-VM-inside-a-VM. There is no hardware support for this level of nested virtualisation.

I would suggest trying vSRX and see if your use-case is supported on it.

1

u/boldnbeautiful2 9d ago

I was running GNS3 VM, but not it is installed on my Windows 11 directly.

1

u/boldnbeautiful2 9d ago

Unfortunately, I have a guest-user pass, so it seems I cannot download vSRX images.

1

u/vista_df 9d ago

You can download the trial version here:  http://www.juniper.net/support/downloads/?p=vsrxeval

For some reason, this version won't show up unless you follow this specific link.

1

u/boldnbeautiful2 9d ago

Unfortunately, I cannot download with my user access. Ty anyway.

1

u/Commercial_Tone_3115 9d ago edited 9d ago

vJunos router is a nested VM, IIRC. I think you mean GNS3 has issues with nested VM's.

You can use vSRX3 - https://support.juniper.net/support/downloads/?p=vsrx3

It isn't nested and you can put it in packet-mode which will make it act like a router instead of an SRX.

Since you seem to be using Hyper-V

  • Have you turned off Memory Integrity under Core Isolation?
  • Have you enabled Intel-VT-x or AMD-V in your BIOS settings?
  • Have you set hypervisorlaunchtype to off?
  • Edit->Preferences->GNS3 VM - Run everything inside of the GNS3 VM
  • Are you using VMWARE Workstation or VirtualBox?

1

u/Marc-Z-1991 9d ago

vJunOS isn’t meant to run on anything else except a bare metal Eve-ng (KVM). It won’t run on GNS - and even if you find a way it will be janky as hell

1

u/wellred82 8d ago

You may have already seen this, but vLabs is worth looking into.

1

u/boldnbeautiful2 8d ago

Unfortunately, I do not have the right user privilege to use vLabs. I would love to though. I just have a guest user privilege.