topic Re: DevNet Sandbox CML - can't add nodes ? in DevNet Sandbox

DevNet Sandbox CML - can't add nodes ?

smstetson — Fri, 30 Jun 2023 15:31:18 GMT

Howdy folks!

Last year I used the DevNet Sandbox Content Modeling Labs to study for my CCNA.

I have been studying other vendors for a while, but am ready to start hitting my CCNP studies pretty hard. I ran through a module in a CCNP course and wanted to build a custom CML lab in the sandbox to lab the material. After a bit of toying with it, I shook off most of the cobwebs and remembered how to reserve a lab, connect with VPN and point my browser at the CML server.

The issue I am having is I seem unable to add any nodes. I recall in the past I was able to create a lab and add nodes (up to the node limit), connect them, configure them etc. I am able to import the labs I created for my CCNA studies which I saved to my laptop. But when I create a lab nowadays, I see nothing that would allow me to add a node. I RTFM'd a little and think I am looking for something called the 'add nodes drawer' which is supposed to be open by default when you have no nodes in a lab topology.

Did Cisco remove the ability to add your own topology in the devnet sandbox ? Did an update occur and it does not like my browser or something? Am I blind and just not seeing where I am supposed to go? I am including a screencap of what I am seeing on the nodes tab of the workbench.

Thanks for any help you are able to provide!

Re: DevNet Sandbox CML - can't add nodes ?

bigevilbeard — Fri, 30 Jun 2023 16:13:38 GMT

I do not think anything has changed feature wise. I think that page you are on shows the nodes in the current topology. To add nodes, i click dashboard, add and drag the devices/nodes i want in.

From the 2.5 docs this is how nodes are added: https://developer.cisco.com/docs/modeling-labs/#!adding-nodes-to-a-lab

HTH

Re: DevNet Sandbox CML - can't add nodes ?

smstetson — Fri, 30 Jun 2023 16:46:18 GMT

Thank you for the reply. Yes - I had found the same link with instructions. In my case - I am totally unable to find the 'drawer' which is supposed to be open by default in my case (no nodes in topology). I feel like I have clicked on everything within the system, but find nothing that has any nodes that I can drag and drop onto my topology. Here is a screen shot of my dashboard where you will note I have only this one lab - with no nodes. Based on the instructions - from the dashboard I think I would click near the title 'basic testing lab' in my case. That takes me to my workbench (lab info tab). Try as I might - I can not find anything that will allow me to add nodes.

Re: DevNet Sandbox CML - can't add nodes ?

bigevilbeard — Fri, 30 Jun 2023 19:44:35 GMT

Its been a while for me here - toggle the show list to off, click add - when you click add the node list should appear from the right side? Unless like you said, with this username no new labs can be added?

Re: DevNet Sandbox CML - can't add nodes ?

smstetson — Fri, 30 Jun 2023 20:25:17 GMT

Thanks for your help! I decided to install a different browser. It is the same setup I was using last year into January this year that worked, but maybe it is no longer supported. Google Chrome behaves as expected, so I am good to go!

To be clear - I could add labs, but I am unable to add any nodes to any labs, whether it be the pre-definied ones, a custom one I import, or a new one.

Here are some more clues. Based on the timestamps of the lab topologies I saved after I completed CCNA, it looks like the last time I was using CML in DevNet was around January. I suspect an update has occurred - because when I import one of the January labs, it says something in the logs about invalid image selections At the very least - the images supported appear to have changed in the last 7 months.

For posterity, here is the setup I am currently running.

[sstetson@centy CCNP_LABS]$ cat /etc/redhat-release
CentOS Linux release 7.9.2009

(Core)Installed Packages
firefox.x86_64 102.12.0-1.el7.centos @updates

I get that this is an older setup. But in case anyone else has a similar setup and runs into issues....

Re: DevNet Sandbox CML - can't add nodes ?

SydneyMangwana0125 — Sat, 15 Jun 2024 08:27:20 GMT

Not sure if this is what you were looking for. I came across your thread as i was struggling on how to add nodes to my Lab, only to realize that it now comes in the form of an icon on the toolbar instead of the sidebar i was used too.

Re: DevNet Sandbox CML - can't add nodes ?

Shani khan — Fri, 08 Aug 2025 11:36:59 GMT

yes that correct. i was going crazy. trying different browser. nodes are under that icon