Lauch fault

[pschristides]

I have been using Devnet sandbox  to access Cisco Modelling Labs as a lab exercise further to Packet Tracer for my CCNA courses at:

https://devnetsandbox.cisco.com/DevNet

Unfortunately for a week now access to the sandbox has been ‘stuck’ in a launching sequence that I cannot abort.

The following error message is provided when attempting to abort launching:

Cannot terminate a Devnet connection that has been stuck in the launching mode for more than 4 days

Cisco Modeling Labs-20250408T17071841  

Status: launching

Ending in 0m 0s

Running terminate is not allowed at the moment, because there’s a conflict with currently running operations. Please wait until these operations are completed.

How can I terminate process?

Please note that I can access sandbox using a Gmail address without a problem.

Thank you

P S Christides

pschristides@cytanet.com.cy

[bigevilbeard]

This happens sadly, the admin/engineering team at a Cisco will need to terminate this for you. If you was looking to run something local like PT, did you try CML free?

[pschristides]

Further to that for some time now I am unable to access Sandbox on a Windows 10 PC with the following error message:

400 Bad Request
Request Header Or Cookie Too Large

On a windows 11 machine, once accessing Sandbox, the choice to reserve CML is greyed out for quite a while. 

What seems to be a problem and how can anyone contact support staff?

Thank you

[bigevilbeard · Accepted solution]

@pschristides let me try and help

• Use a private or incognito browser for accessing the sandbox, even the sandbox catalog landing page
• The tile for the sandbox being grey means one of two things, the sandbox in question is not available or it is at the max capacity/reservation limit. If you hold your cursor over the tile it will show the capacity 
• This forum is monitored by the support team. Please note, sandboxes are provided as a free resource with no SLA or guarantee of availability

Hope this helps.