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Resolved! Unable to access the labs

Is anyone else experiencing issues accessing the Labs? I am receiving the error "400 Bad Request, Request Header Or Cookie Too Large"

ACI Simulator Always-On

Dear team,First of all, thank you for your time reading this message.I would like to use the "ACI Simulator Always-On", but I'm getting in the I/O tab the "status" of "host unreachable"...It's the first time I'm trying to use the ACI...What am I miss...

l-narciso by Level 1
  • 155 Views
  • 2 replies
  • 0 Helpful votes

Resolved! Launch failure OS XE on Cat8kv

I am trying to study for the Devnet specifically YANG and NETCONF using the IOS XE cat8kv sandbox but every time I try launching the lab I get an error a few second in stating "Torque was not able to complete launching your environment. For more deta...

coolfooly by Level 1
  • 102 Views
  • 5 replies
  • 0 Helpful votes

No devices on Meraki Sandbox

Hello Support Team,A new Meraki sandbox is requested and created . After logging in with the provided credentials, no devices are visible on the Meraki dashboard. Your support would be greatly appreciated.

BisratM by Level 1
  • 59 Views
  • 5 replies
  • 0 Helpful votes

VPN: Security Warning: Untrusted Server

My reserved sandbox was created successfully but when I try to VPN using AnyConnect from the Windows store, I get a certificate error (Untrusted Server).  I turned off Block Untrusted Servers in the AnyConnect settings and I'm still unable to connect...

Resolved! Catalyst Center Always-On

Hello Team,I'm trying to gain access to the Catalyst Center Sandbox.As per the set up instructions below.host: https://sandboxdnac2.cisco.comusername: devnetuserpassword: Cisco123!status: OKWhen I add this link in the vpn it's showing that alert,when...

Resolved! Cisco SD-WAN access details

Hello, I'm trying to gain access to the SD-WAN Sandbox [SD-WAN 20.10 AlwaysOn]. As per the set up instructions below. URL: https://sandbox-sdwan-2.cisco.com username: devnetuserpassword: RG!_Yw919_83 When I enter these credentials, I get an invalid u...

J100 by Cisco Employee
  • 246 Views
  • 4 replies
  • 0 Helpful votes

Resolved! 400 Bad Request error in Chrome on devnetsandbox.cisco.com

Does anyone else run into this issue on Chrome, where after logging into https://devnetsandbox.cisco.comwith your CCO login, it returns this Request Header or Cookie Too Large HTTP 400 Bad Request error? I can fix it every time by right-clicking > In...

bmcgahan by Level 1
  • 300 Views
  • 4 replies
  • 1 Helpful votes

Cannot terminate IOS XE Cat8kv sandbox

Hello,My IOS XE on Cat8kv sandbox instance is stuck in Terminate Failed and will not shut down. I cannot launch a new session because the old environment is still active.Instance Name: IOS XE on Cat8kv-20251121T00301950Status: Terminate FailedTime: N...

890004966 by Level 1
  • 199 Views
  • 1 replies
  • 0 Helpful votes

ACI timing out

Starting around 11am EST today (11/19) I have been unable to connect to the Always-On sandbox because it keeps timing out. It was working just a little while earlier. I'm wondering if anyone else is encountering this and/or if there is a known outage...

fmcrestapisandbox.cisco.com certificate expired

The certificate of the Cisco Secure Firewall Management Center DevNet sandbox is expired on the 4th of November 2025.Not sure how to report it to the Cisco guys responsible for it so I'm trying my luck here.

CroGuard by Level 1
  • 613 Views
  • 5 replies
  • 0 Helpful votes