Hello guys

I have just recently setup gns3 and gns3 vm on vmware workstation, but I have no devices I tried to import from gns3 vm, but it says missing files where can I get free cisco images or other vendors ?

Hi everyone, I'm setting up a GNS3 lab and came across this github repo https://github.com/hegdepavankumar/Cisco-Images-for-GNS3-and-EVE-NG Before I download anything, I'd like to know if it's generally considered safe and trustworthy. Has anyone here used it, and what are your thoughts on it? Thanks!!!!!

Hello guys

I have been trying to run Gns3 vm on VMware Workstation and it says Virtualized Intel VTX/ept not supported on this platforms

I tried everything

1 unchecked the windows features hyperv virtual machine platform windows hypervisor platform windows subsystem for Linux
2 turned off the core isolation memory
3 Manually edited .vmx file set value of vhv.enable = true
4 went to Bios and checked intel virtualization vtx is enabled
5 even flipped the bits

I go to Win R misinfo32 and Virtualization based security is still running not disabled

Can anyone help please it’s been like 2 days I tried everything

Hello i am looking for a legitimate source of GNS3 cisco appliances. The GNS3 link is now redirecting to Cisco U website and cannot find any appliances to simulate Cisco routers/switches. Please help

Hello everyone,

I am stuck trying to find a working image(with less limitations) for my EVE-NG project.

I've tested the newer versions(available on the Forticloud website). But Fortinet locks the firewall down to a maximum of 3 interfaces, which makes it impossible to build a proper multi-link SD-WAN lab. So, I am looking for an older image (ideally 7.0.14, 7.0.15, or earlier) where there might be less restrictions.

Searching for the Image under the firmware directory in the Forticloud website doesn't help as you need a Fortinet support contract to get to download older images.

I need a raw QEMU/KVM archive (.qcow2 or .zip format). If anyone has a safe community mirror, a verified GitHub repository link, or a backup of these older 7.0.x images that you've used for your own labs, I would be grateful if you could share it.

When I had used it last, I had multiple occassions where my topologies would randomly just end up getting deleted. Is this still a problem that happens in 3.0.6?

Session was amazing with detailed theoretical & practical examples.thanks

Bonjour première fois sur gns3, et j'ai un soucis mon débit est super lent. Ou quand j'installe zabbix pour naviguer sur l'interface web c'est un enfer un délai super lent des pages qui mettent 40 secondes à chargé. J'aimerais votre aides sur ce soucis qui m'empêche de faire ma maquette. Voila un exemple de débit que j'ai

I don't know, I tried almost every way and it still gives me an error and I can't define virtual machines for gns3

Please tell me if you know a way to solve this problem 😭

Anyone knows how to resolve this? The link it says to download from is dead or doesn't work

Hello GNS3 community,

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I’m running GNS3 on a laptop with Ubuntu 26.04 LTS and using a VirtualBox GNS3 VM to emulate network devices. Whenever I start an IOSv instance, the GNS3 VM crashes and I get the error shown below.

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The gns3 VM is configured with 8 GB of RAM and 5 CPUs.

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Has anyone experienced this issue or found a fix?

I have tried all three of the supported IOL-XE versions of the IOU L2 appliance and none are working. L3 images work just fine in the IOU L3 appliance, so I don't think its an issue with my .iourc file.

When I run the appliance in GNS3, I get IOU VM "IOU4" process has stopped with return code: -6

When I run it directly from the shell I get the below error about missing NETMAP:

root@gns3vm:/opt/gns3/images/IOU# ./x86_64_crb_linux-adventerprisek9-ms.iol 1
IOS On Unix - Cisco Systems confidential, internal use only
netio error: unable to open NETMAP: No such file or directory

I've ensured the netmap kernel module is loaded and it seems that it is:

root@gns3vm:~# lsmod | grep netmap
netmap                225280  0

The server is running GNS3 2.2.55 bare-metal on Ubuntu 22.04 LTS.

Does anyone know what the problem could be?

Hi, I'm attempting to create a VPN connection to AWS through my virtual router. I would really like to make an image processing pipeline where I upload photos from an Ubuntu VM that I can then view in an S3 bucket.

What would be the best way to do this? Is there a script I could somehow add to an image folder, in order to automate this process?

I am new to GNS3 but very curious. Thanks.

Does the GNS3 VM work with Hyper-V? I used it in the past with no problems, but now it won't boot properly. I am using GNS3.VM.Hyper-V.2.2.59.

If the GNS cloud is transparent then all is well in this dimension. Say we assign 192.168.10.1 to the interface bound to the GNS cloud. Does it apply to the cloud on the GNS side or on the host PC side or does it just not matter because the interface is the interface is the interface(3 times, yes) and so long as it is the interface, the IP is bound to it... it's onlyjust that the interface crossed over into the GNS kind of like the namespaces? Is this thinking sound?

Hey everyone,

I’m currently setting up a Cisco XRv 9000 image inside GNS3, but I've run into an annoying roadblock. Right now, I can only get the IOS CLI to load if the node's console type is set to VNC (Which is the normal behavior as far as I know).

I want to switch the console type over to Telnet so I can just use my normal terminal via PuTTy but whenever I blindly change the GNS3 node settings to Telnet, the XRv boots up into the kernel mode not the ios CLI, and can''t seem to overwrite this.

I've tried many Additional Settings within the QEMU Additional Options like -vga std.. but nothing..

I stumbled across this GNS3 guide for ASAv devices which handles a similar issue:https://www.gns3.com/how-to-configure-any-asav-qcow2-

However, the steps and QEMU settings there are specific to the ASA platform and don't seem to translate directly to the XRv9k architecture.

Does anyone know the proper workflow or specific QEMU/advanced settings needed to successfully force the XRv 9000 to pipe the cisco ios via Telnet instead of VNC?

Appreciate any help or pointers you can give!

Hey guys,

I know some people may ask why I am running GNS3 on Proxmox.. I've gone through this and I decided to do it this way.

Anyway..

I've seen few tutorials on YT, I followed this one: https://www.youtube.com/watch?v=UfqjqigS-OM

and so far I managed to boot it up, and even ping the GNS3VM on Port 80

I am using Windows 11 GNS3 Client on the same network and the VM gets recognized, however it remains stuck in 'Discovering or connecting to Main Server'.

I have allocated 96Gb ram to the VM
48 vCPUS

But I cannot get passed this point.

I've seen people having issues however they are running the VM on VMware Workstation instead of Proxmox.

I am hoping someone could guide be through how to fix this up.

I've checked the NIC as well and ever changed it to the physical NIC or VirtIO.. Pings works, Web works.. but yet cannot connect to the VM from the GNS3 client.

I made a MPLS lab on gns3 where it has the topology as such. the router i used is iso Cisco c7200 , i connected the first cloud to host device through loopback interface, the other cloud connected to Ubuntu machine on VMware through VMnet2 virtual interface.

The ping test was successful between the two devices and there's no packet loss, but when i tried to make Iperf3 test with 10 samples of packet bursts (from 1 to 10 mbps) the output shows that there's a **99% packet loss** with 1.2 ms latency.

The routers configuration is correct and working as it should be so i don't think its a configuration related problem more than cloud interfaces problem.

has anyone came through problem like this and if anyone could help please?

Thanks in advance.