topic CML lab not opening after reservation in DevNet Sandbox

CML lab not opening after reservation

Mujahid_Nour — Tue, 02 Mar 2021 20:33:10 GMT

greetings ,

I have reserved CML lab and i received the login details and i connected to VPN .

but i cant open the lab web interface at https://10.10.20.161 .

kindly advice . note that I’ve turn off windows firewall but also the same

Re: CML lab not opening after reservation

Martin L — Tue, 02 Mar 2021 20:58:06 GMT

make sure you are connected and green light is present at VPN.

then login with password to https://10.10.20.161 . username and password provided on devnet lab details

Try different browser.

Regards, ML
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Re: CML lab not opening after reservation

Mujahid_Nour — Wed, 03 Mar 2021 09:03:24 GMT

Hi Martin ,
Note that VPN connected as attached PIC . i try 2 different browser google chrome & Microsoft Edge . but no luck to open the CML .

Re: CML lab not opening after reservation

Martin L — Wed, 03 Mar 2021 19:34:04 GMT

maybe that was a temp issue. Try new reservation today, is problem the same ?

DevNet reservation and vpn works for me. Just VPN drops connection but reconnects right away.

Regards, ML
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Re: CML lab not opening after reservation

Mujahid_Nour — Sat, 13 Mar 2021 22:00:36 GMT

I've reserved the lab in 2 different times but the issue still same .

Re: CML lab not opening after reservation

matiascisternas605680298 — Tue, 23 Mar 2021 05:18:13 GMT

I had this problem because I used solar-putty and secure crt without Breakout tool. Firts was with secure crt and i fixed unistalling it together the browser. Then I installed the browser again. But today I used solar-putty and i can't fixed with the previous instructions. I need help with this! I only know that firewall is not the problem.

Re: CML lab not opening after reservation

KingsleyOgunedo9090 — Thu, 03 Jun 2021 18:53:24 GMT

I am having the same problem. Any solutions please?

Re: CML lab not opening after reservation

BrooksHassinger09174 — Thu, 03 Jun 2021 19:32:58 GMT

I'm encountering the same issue, the server is closing the connection. It's not a client-side issue.

Re: CML lab not opening after reservation

Martin L — Thu, 03 Jun 2021 20:41:20 GMT

it works for ME ! I Just opened CML. VPN connection dropped twice at very beginning bit now it is stable.

it must be something on your side guys

Regards, ML
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Re: CML lab not opening after reservation

PiotrWikarski44780 — Fri, 04 Jun 2021 04:10:41 GMT

Martin it might work for you. But it's not working for many people including myself.

I've been using CML 2.0 for about 6 month now and never had this issue. After providing login and password I'm able to make a SUCCESSFUL VPN connection but the https://10.10.20.161 just won't open. I've tried different browsers and accounts.

Yesterday it didn't work, but when I've logged in using different account I was able to open https://10.10.20.161.

Today I'm unable to access the web interface from both accounts.

Re: CML lab not opening after reservation

PiotrWikarski44780 — Fri, 04 Jun 2021 04:30:49 GMT

Re: CML lab not opening after reservation

PiotrWikarski44780 — Sat, 05 Jun 2021 05:33:22 GMT

It works now, and I can reserve for 4 days instead of 4 hours! Amazing!! Thank you Devnet!!!

Re: CML lab not opening after reservation

Martin L — Sat, 05 Jun 2021 18:36:18 GMT

4 days !!! that's too much. if people reserved that much time and not using it or forgot to end session when done, there will be none instances left for others. right?

Re: CML lab not opening after reservation

PiotrWikarski44780 — Sat, 05 Jun 2021 19:44:20 GMT

I'm sure devnet people have though about it. Maybe it's just temporary. Maybe there won't be any problems. We can guessing.

I didn't mind 4 hours, but 4 days will be more convenient if it won't impact the ability to reserve the labs off course.

Re: CML lab not opening after reservation

Martin L — Sat, 05 Jun 2021 20:09:22 GMT

My idea was you can reserved for 2/4 hours and keep extending reservation. They say this 4-day is not an issue since they have more resources now then before (probably cloud hosting). Also, you can make and have only 1 reservation for you / aka per person. You should be not able to make another different sandbox reservation. I have not tried that yet !

Regards, ML
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Re: CML lab not opening after reservation

tombry — Sun, 06 Jun 2021 15:54:33 GMT

@KingsleyOgunedo9090 @BrooksHassinger09174 @PiotrWikarski44780 - We reported the problem up to the DevNet Sandbox team. They tracked down the problem, and the root cause was a combination of a couple of problems that was causing about 5% of CML Sandbox reservations to fail. The problem was fixed by June 4. There may still be a few old reservations where the CML instance is not configured properly, so if you're still having problems in your current reservation, end the reservation and start a new one. All new CML sandbox reservations should be working now.

Re: CML lab not opening after reservation

tombry — Sun, 06 Jun 2021 16:08:33 GMT

Interesting. I know that I used to be able to extend the CML sandbox beyond 4 hours, but I thought that the Sandbox had recently started enforcing maximum sandbox reservation times.

When I make a CML Sandbox reservation today, I am limited to 4 hours. If I try to extend the reservation beyond 4 hours from the initial reservation start time, it fails with an error that indicates:

Sandbox duration 05:00:00 must be shorter than the blueprint's maximum duration 04:00:00.

The labs that CML runs are not lightweight, so that makes sense to me. The free sandbox is mostly there for the community to try things out. If you need a CML instance that runs for more than 4 hours, you can always purchase a license. 🙂 CML-Personal is only $199 or 2 Cisco Learning Credits. A community member even recently posted instructions for running your own CML instance in AWS: https://github.com/gdmoney/Cisco-CML-on-AWS.

YMMV

Happy labbing!

Re: CML lab not opening after reservation

Mujahid_Nour — Mon, 07 Jun 2021 13:34:06 GMT

I'm still unable to open the Cisco Modeling Labs Server: 10.10.20.161

VPN connected. I've tried to switch off the firewall but the issue still.

any solution or suggestions .?

Re: CML lab not opening after reservation

HenryGee — Mon, 07 Jun 2021 19:16:01 GMT

Seems like sometimes it works and sometimes it doesnt.. its been a little buggy lately, but still thankful to Cisco for providing these labs to us! Thanks Cisco for your hard work!

Re: CML lab not opening after reservation

tombry — Mon, 07 Jun 2021 21:35:37 GMT

@HenryGee wrote:

Seems like sometimes it works and sometimes it doesnt.

Agreed. I saw another failure today, and I've been in touch with the DevNet Sandbox group. They've observed the problem, but they're still working on the root cause. Until this issue is resolved, I expect that there will be some intermittent failures with CML sandbox reservations.