After upgrade to v2.1.3 'Unable to create UDP NIO' when trying to open previous projects #1271

AJNOURI · 2018-01-25T10:30:44Z

From gns3 community forum:
https://gns3.com/qa/-unable-to-create-udp-nio-when-t

Found an similar issue here that was solved then:
#825

Hi GNS3 team, right now i have a problem with GNS3 2.1.3

before i update the GNS3, i was on 2.1.1 version, and it worked perfectly.

Today i updated it to 2.1.3 version, and after that, i cannot open any of my previous projects.

when i try to open a previous project, a message appear.

2018-01-24 21:08:19 CRITICAL topology.py:222 Dynamips error when running command 'nio create_udp udp-1e8bae55-4645-420c-b8b4-0ad5d9b2a429 10001 127.0.0.1 10000
': unable to create UDP NIO
PORT=5900
2018-01-24 21:09:34 CRITICAL topology.py:222 Dynamips error when running command 'nio create_udp udp-687795f3-9760-4a9c-bc43-5801f1ddf358 10001 127.0.0.1 10000
': unable to create UDP NIO

tried to change the UDP tunneling port range minimum to 10001 but still no result.

the UDP tunneling port range is in default number, min 10000 and max 20000

btw, i am using Linux Mint 18.3 sylvia

can you guys help me solve the problem?

thanks before.

grossmj · 2018-01-29T10:54:32Z

User solved this issue.

grossmj · 2018-03-31T04:43:33Z

I am experiencing this issue too.

grossmj · 2018-03-31T06:08:50Z

There was an issue in Dynamips fixed in GNS3/dynamips@4f58a57

Please download Dynamips version 0.2.18 if you experience this issue: https://github.com/GNS3/dynamips/releases/tag/v0.2.18

grossmj · 2018-03-31T06:11:47Z

@ziajka please make sure we have version 0.2.18 released on our ppa, thanks 👍

ziajka · 2018-04-03T07:38:44Z

@grossmj released.

Menelan · 2019-10-11T21:35:47Z

Today I had the same problem, I tried all the solutions proposed on different site, none worked ...
Reinstalling GN3 with and without restarting the computer, removing gns3 registry keys and more.
I finally found the solution and I want to share it because I think it will help somebody.
I found the solution with a stroke of luck, it came from the software nvidia Geforce Experience, because when I did not have it I could open my projects, but once installed I could not do it anymore, I did the test several times and the problem comes from the GeForce Experience software.
I hope this will help some person.

Deadmaus2630 · 2019-10-13T00:37:38Z

Hello bro, I'm from Peru, I was killing my head that it could be the mistake, thank you very much for your contribution, you really saved my life since I had a project of my career and I could not open it and there is not much information about this error

grossmj · 2019-10-13T14:47:15Z

@Deadmaus2630 did you encountered the exact same problem with GeForce Experience software?

Deadmaus2630 · 2019-10-15T15:40:28Z

Hello, if I found the same error, do you know if it is an error in the nvidia program or is it from gns3?

xJoaoMonteiro · 2019-10-17T08:06:00Z

I was facing the same problem and removing nvidia Geforce Experience software solved my problem. Thanks a lot guys

Menelan · 2019-10-17T10:06:06Z

No problem. I hope the problem will be solved quickly.

mazi6v6 · 2019-10-17T18:15:29Z

@Menelan Thanks a lot! My problem was solved!

phoenix2291 · 2019-10-21T16:49:28Z

@grossmj I'm facing the same issue about the Geforce experience. Tested on two different machines and same issue is occurring. I issued a ticket to Nvidia and requested the developers from GNS3 to check from there side. If you have a solution please.

Menelan · 2019-10-29T10:27:29Z

@phoenix2291 The solution for the moment is to go to "control panel" and "uninstall a program", just uninstall "Nvidia GeForce Experience", the driver will always be installed.
There is no other solution known at the moment, the problem can simply come from a registry key modify by the software "Nvidia" which would prevent the opening of the projects, but that can be more complex, no idea from my side, I have not looked enough for the moment.

grossmj · 2019-10-30T07:14:43Z

Need to check if I can understand why "Nvidia GeForce Experience" conflicts with Dynamips.

julio-rs713 · 2019-11-02T02:49:46Z

My case it's not because i has upgraded the software, it has happened with a new installation and a new project with this, but maybe this can be of help to somebody. By the way, my mother language isn't english.
I has a similar problem: I saved my project with other name and there was a problem with it, the project was created but i was unable to open the new project and the original, with the message:
Dynamips error when running command 'nio create_udp udp-547de233-2b2f-40f6-b802-f96cec82335f 10010 127.0.0.1 10009
': unable to create UDP NIO.
Just in case, I tried creating a new proyect, it works well, and I saved it with other name (it worked). After that i opend my original project with the error, and this works. I saved the original project with other name, and also works, I just repeated with a new project the events that cause my project to have that error, and that fixes it.

keithallenjackson · 2019-11-04T17:21:30Z

Just confirmed this fix for me: removing GeForce Experience fixed all issues regarding the "unable to create UDP NIO" error. Seriously curious as to why GeForce Experience would cause this problem.

cristian-ciobanu · 2019-11-04T18:30:50Z

I found this knowledge base article on nVidia support site

https://nvidia.custhelp.com/app/answers/detail/a_id/4566/~/error-message-0x8008201c

It seems Nvidia software uses the same port range TCP/UDP 10000 - 20000 which might conflict with the GNS3 console port range

kervinroz · 2019-11-05T09:19:03Z

Guys thanks a lot! I recently purchased a new Graphics Card and Installed Nvidia Geforce Experience. All of a sudden, my GNS3 started working cranky. So I started to uninstall the NGE program. Things went smooth and got fixed! :D

AndreDias96 · 2019-11-05T23:01:41Z

Today I had the same problem, I tried all the solutions proposed on different site, none worked ...
Reinstalling GN3 with and without restarting the computer, removing gns3 registry keys and more.
I finally found the solution and I want to share it because I think it will help somebody.
I found the solution with a stroke of luck, it came from the software nvidia Geforce Experience, because when I did not have it I could open my projects, but once installed I could not do it anymore, I did the test several times and the problem comes from the GeForce Experience software.
I hope this will help some person.

Thanks for help. I was thinking that I would have to format the computer.

grossmj · 2019-11-06T04:24:42Z

It seems Nvidia software uses the same port range TCP/UDP 10000 - 20000 which might conflict with the GNS3 console port range.

I am going to change the default UDP port range to be 20000 - 30000 in our next release. I hope this is going to prevent the issue to happen again.

GuruOz · 2019-11-08T22:59:11Z

Just to confirm, i tried downloading the linked Dynamips version 0.2.18. That did not work. But removing NVIDIA GeForce Experience fixed the issue

PS: Thanks grossmj & Menelan

vint66 · 2019-11-13T22:52:21Z

Hi Jeremy,

Just want to mention that server config still has old port. Does it make sense to change it here also?

; First console port of the range allocated to devices
console_start_port_range = 5000
; Last console port of the range allocated to devices
console_end_port_range = 10000
; First port of the range allocated for inter-device communication. Two ports are allocated per link.
udp_start_port_range = 10000
; Last port of the range allocated for inter-device communication. Two ports are allocated per link
udp_end_port_range = 20000

Also it seams like you hard coded ports here, so probably config above doesn't make much sense.

….conf Ref #1271

Spartan-X · 2019-12-10T22:25:19Z

Thanks killing the Nvidia Services worked!! thanks very much

Today I had the same problem, I tried all the solutions proposed on different site, none worked ...
Reinstalling GN3 with and without restarting the computer, removing gns3 registry keys and more.
I finally found the solution and I want to share it because I think it will help somebody.
I found the solution with a stroke of luck, it came from the software nvidia Geforce Experience, because when I did not have it I could open my projects, but once installed I could not do it anymore, I did the test several times and the problem comes from the GeForce Experience software.
I hope this will help some person.

karatsyupa · 2019-12-15T14:51:13Z

Hi all,

Just want to inform removing nvidia Gefore Experience worked for me also. It start working after uninstall instantly.

vasiliyaltunin · 2020-01-02T05:55:26Z

I have same issue on windows 10 with 2.2.3 version
Fixing file

C:\Users\user\AppData\Roaming\GNS3\2.2\gns3_server.ini

and set

udp_start_port_range = 20000
udp_end_port_range = 30000

resolve this issue i think on windows config must be changed by default!

bsweeney83 · 2020-01-04T03:45:12Z

This issue has been driving me nuts for months while trying to use GNS3 to study for the CCNA. Every time I would create a project, I couldn't open it after closing GNS3 and would have to start from scratch every time. Very annoying to say the least. I found multiple threads in the GNS3 Community for this error, but nobody provided an actual fix/workaround in any of them. Glad I found this thread by clicking on a Google image with the error. I just uninstalled Geforce Experience and now I can open old projects. This sucks though because I like having Geforce Experience installed.

bsweeney83 · 2020-01-04T03:56:19Z

I have same issue on windows 10 with 2.2.3 version
Fixing file

C:\Users\user\AppData\Roaming\GNS3\2.2\gns3_server.ini

and set

udp_start_port_range = 20000
udp_end_port_range = 30000

resolve this issue i think on windows config must be changed by default!

This didn't work for me.

vasiliyaltunin · 2020-01-04T04:37:28Z

I have same issue on windows 10 with 2.2.3 version
Fixing file
C:\Users\user\AppData\Roaming\GNS3\2.2\gns3_server.ini
and set
udp_start_port_range = 20000
udp_end_port_range = 30000
resolve this issue i think on windows config must be changed by default!

This didn't work for me.

You may need reboot after this changes.

bsweeney83 · 2020-01-04T05:43:06Z

I have same issue on windows 10 with 2.2.3 version
Fixing file
C:\Users\user\AppData\Roaming\GNS3\2.2\gns3_server.ini
and set
udp_start_port_range = 20000
udp_end_port_range = 30000
resolve this issue i think on windows config must be changed by default!

This didn't work for me.

You may need reboot after this changes.

Good call. I reinstalled Geforce Experience and then rebooted, and can now open projects without a problem. Thanks!

fred-cardoso · 2020-01-09T00:03:19Z

I can also vouch for this solution. @vasiliyaltunin solution seems to be the way to go.

techcanbefun · 2020-01-11T01:09:13Z

I can confirm uninstalling "NVIDIA GeForce Experience" fixed my issue of opening GNS3 projects. Thank you everyone.

Dan-Donato · 2020-01-25T01:43:34Z

I have same issue on windows 10 with 2.2.3 version
Fixing file

C:\Users\user\AppData\Roaming\GNS3\2.2\gns3_server.ini

and set

udp_start_port_range = 20000
udp_end_port_range = 30000

resolve this issue i think on windows config must be changed by default!

This fixed the issue for me also.
Thank you!

grossmj · 2020-01-25T08:50:00Z

The UDP port range has been changed to 20000-30000 since GNS3 version 2.2.3. As explained above, the 2 ways to solve the issue are:

To edit the server config located in C:\Users\user\AppData\Roaming\GNS3\2.2\gns3_server.ini by default and set udp_start_port_range = 20000 + udp_end_port_range = 30000
Uninstall "NVIDIA GeForce Experience" which conflicts with GNS3.

chunji08 · 2020-03-04T21:29:57Z

I had the exactly the same problem. My GNS3 of version 2.1.9 is installed on window 10, and both GNS3 main server and remote servers are on a bunch of ubuntu VM. What I don't understand is I was not able to open some projects, but the rest are OK. The difference from project to project, are they are on the different remote server ? So what could be the fix for my case ?

The reason I didn't update to the latest GNS3 is , the GNS3 not backward compatible. If I had the newer one installed, it could not even detect my old projects.

boringthegod · 2020-04-16T11:23:03Z

I have same issue on windows 10 with 2.2.3 version
Fixing file
C:\Users\user\AppData\Roaming\GNS3\2.2\gns3_server.ini
and set
udp_start_port_range = 20000
udp_end_port_range = 30000
resolve this issue i think on windows config must be changed by default!

This didn't work for me.

You may need reboot after this changes.

Good call. I reinstalled Geforce Experience and then rebooted, and can now open projects without a problem. Thanks!

Same, thanks

Neanding · 2020-05-17T00:24:47Z

thank you so much!! :)

b-codex · 2021-08-12T14:17:17Z

Solution : change the default UDP port range to be 20000 - 30000.

chathuraamal · 2022-01-24T17:59:27Z

I'm having this issues but can't seem fix it with the fixes mentioned here.
I've uninstalled gns3 and reinstalled it as well but still can't
nvidia experience is not uninstalled and I've changed the default UDP port range to 20000- 30000 but can't seem to get it to work
anytime I connect two routers I get this error
what am I doing wrong here?

b-codex · 2022-01-24T19:21:19Z

for me changing the port worked. i dont really know what is causing it besides the port collision with NVIDIA experience.
maybe share ur screenshot here...?

chathuraamal · 2022-01-25T15:58:39Z

for me changing the port worked. i dont really know what is causing it besides the port collision with NVIDIA experience. maybe share ur screenshot here...?

thanks for the reply b-codex
posted some screencaps as you've suggested.
I've tried several udp port ranges (2k-3k, 10k- 20k, 20k-30k) but can't seem to identify what is causing the problem.
I don't have nvidia experience installed (I only have the gpu drivers installed) and tried with AV turned off (eset)

FredyxD25 · 2022-03-12T00:39:53Z

I solved this problem changing my default UDP port range to 20000 to 30000

gh05t-me · 2023-06-09T11:24:25Z

Today I had the same problem, I tried all the solutions proposed on different site, none worked ... Reinstalling GN3 with and without restarting the computer, removing gns3 registry keys and more. I finally found the solution and I want to share it because I think it will help somebody. I found the solution with a stroke of luck, it came from the software nvidia Geforce Experience, because when I did not have it I could open my projects, but once installed I could not do it anymore, I did the test several times and the problem comes from the GeForce Experience software. I hope this will help some person.

Thanks a LOT

grossmj self-assigned this Jan 25, 2018

grossmj added this to the 2.1.4 milestone Jan 25, 2018

grossmj closed this as completed Jan 29, 2018

grossmj modified the milestones: 2.1.4, 2.1.5 Mar 31, 2018

grossmj reopened this Mar 31, 2018

grossmj closed this as completed Mar 31, 2018

grossmj reopened this Oct 30, 2019

grossmj modified the milestones: 2.1.5, 2.3 Oct 30, 2019

grossmj added a commit that referenced this issue Nov 6, 2019

Change the default UDP port range to be 20000 to 30000. Ref #1271

539cf64

grossmj added a commit that referenced this issue Dec 6, 2019

Change the default UDP port range to be 20000 to 30000 in gns3_server…

825dc59

….conf Ref #1271

grossmj closed this as completed Jan 25, 2020

grossmj mentioned this issue May 24, 2020

Short description of the bug GNS3/gns3-gui#2988

Closed

After upgrade to v2.1.3 'Unable to create UDP NIO' when trying to open previous projects #1271

After upgrade to v2.1.3 'Unable to create UDP NIO' when trying to open previous projects #1271

Comments

AJNOURI commented Jan 25, 2018 • edited

grossmj commented Jan 29, 2018

grossmj commented Mar 31, 2018

grossmj commented Mar 31, 2018

grossmj commented Mar 31, 2018

ziajka commented Apr 3, 2018

Menelan commented Oct 11, 2019

Deadmaus2630 commented Oct 13, 2019

grossmj commented Oct 13, 2019

Deadmaus2630 commented Oct 15, 2019

xJoaoMonteiro commented Oct 17, 2019

Menelan commented Oct 17, 2019

mazi6v6 commented Oct 17, 2019

phoenix2291 commented Oct 21, 2019 • edited

Menelan commented Oct 29, 2019 • edited

grossmj commented Oct 30, 2019

julio-rs713 commented Nov 2, 2019

keithallenjackson commented Nov 4, 2019 • edited

cristian-ciobanu commented Nov 4, 2019 • edited

kervinroz commented Nov 5, 2019

AndreDias96 commented Nov 5, 2019

grossmj commented Nov 6, 2019

GuruOz commented Nov 8, 2019 • edited

vint66 commented Nov 13, 2019 • edited

Spartan-X commented Dec 10, 2019

karatsyupa commented Dec 15, 2019

vasiliyaltunin commented Jan 2, 2020 • edited

bsweeney83 commented Jan 4, 2020

bsweeney83 commented Jan 4, 2020

vasiliyaltunin commented Jan 4, 2020

bsweeney83 commented Jan 4, 2020

fred-cardoso commented Jan 9, 2020

techcanbefun commented Jan 11, 2020 • edited

Dan-Donato commented Jan 25, 2020

grossmj commented Jan 25, 2020

chunji08 commented Mar 4, 2020

boringthegod commented Apr 16, 2020

Neanding commented May 17, 2020

b-codex commented Aug 12, 2021

chathuraamal commented Jan 24, 2022 • edited

b-codex commented Jan 24, 2022

chathuraamal commented Jan 25, 2022

FredyxD25 commented Mar 12, 2022 • edited

gh05t-me commented Jun 9, 2023

AJNOURI commented Jan 25, 2018 •

edited

phoenix2291 commented Oct 21, 2019 •

edited

Menelan commented Oct 29, 2019 •

edited

keithallenjackson commented Nov 4, 2019 •

edited

cristian-ciobanu commented Nov 4, 2019 •

edited

GuruOz commented Nov 8, 2019 •

edited

vint66 commented Nov 13, 2019 •

edited

vasiliyaltunin commented Jan 2, 2020 •

edited

techcanbefun commented Jan 11, 2020 •

edited

chathuraamal commented Jan 24, 2022 •

edited

FredyxD25 commented Mar 12, 2022 •

edited