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 Post subject: Re: Qemu maximum Adapter 8 Limitation on new gns3 for window
PostPosted: Tue Oct 21, 2014 5:34 am 
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Joined: Fri May 13, 2011 6:03 pm
Posts: 10
twv wrote:
claydon_dan wrote:
Jeremy is correct... It is a qemu limitation (that is well known with a little google search).

It's possible to modify qemu to support more as mentioned in the following post: post6979.html#p6979

And the file in question can be seen in full in the Qemu Github mirror: https://github.com/qemu/qemu/blob/maste ... net.h#L163

From a GNS3 point of view, I feel it's most sensible to stick with what Qemu has as it's default (otherwise we're going to run into problems with people not running a modified version).


The QEMU version (0.11.0) that comes packaged with the All-In-One GN3 0.8.7 seems to limit the number of adapters to 8 but the QEMU (2.1.0) bundled with the beta works fine if you point the 0.8.7 GUI to use the beta 4 version.

I used a standalone install of QEMU on Windows 7,was able to use the qemuwrapper and qemu-img that were bundled with GNS3 but changed the executable path to the standalone Qemu.

So just to be clear: GNS3 0.8.7 gui, qemuwrapper.ex, and qemu-img.exe was used with the QEMU (2.15.0) binary installed as a standalone.

The results were that I was able to bump the NICs up to 16 in the QEMU config for Tinycore connect it to a hub, put a router on the other side, and ping back and forth with eth15. I didn't check every adapter available and I can't account for stability because I don't have a use for 16 ports on one guest yet.

So current limitation is a matter of the GUI's hard limit of 8 adapters max.


Hi Twv,

thanks buddy for sharing your trick .would you pls tell from where u get QEMU (2.15.0) binary installer for windows .as on gns3 portal i search but not get i also search on qemu there also its not available.please help me to get it share your QEMU (2.15.0) binary installer with us....

thanks once again




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 Post subject: Re: Qemu maximum Adapter 8 Limitation on new gns3 for window
PostPosted: Tue Oct 21, 2014 6:29 am 
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Joined: Sat Oct 04, 2014 8:38 am
Posts: 45
raipraveen83 wrote:
twv wrote:
claydon_dan wrote:
Jeremy is correct... It is a qemu limitation (that is well known with a little google search).

It's possible to modify qemu to support more as mentioned in the following post: post6979.html#p6979

And the file in question can be seen in full in the Qemu Github mirror: https://github.com/qemu/qemu/blob/maste ... net.h#L163

From a GNS3 point of view, I feel it's most sensible to stick with what Qemu has as it's default (otherwise we're going to run into problems with people not running a modified version).


The QEMU version (0.11.0) that comes packaged with the All-In-One GN3 0.8.7 seems to limit the number of adapters to 8 but the QEMU (2.1.0) bundled with the beta works fine if you point the 0.8.7 GUI to use the beta 4 version.

I used a standalone install of QEMU on Windows 7,was able to use the qemuwrapper and qemu-img that were bundled with GNS3 but changed the executable path to the standalone Qemu.

So just to be clear: GNS3 0.8.7 gui, qemuwrapper.ex, and qemu-img.exe was used with the QEMU (2.15.0) binary installed as a standalone.

The results were that I was able to bump the NICs up to 16 in the QEMU config for Tinycore connect it to a hub, put a router on the other side, and ping back and forth with eth15. I didn't check every adapter available and I can't account for stability because I don't have a use for 16 ports on one guest yet.

So current limitation is a matter of the GUI's hard limit of 8 adapters max.


Hi Twv,

thanks buddy for sharing your trick .would you pls tell from where u get QEMU (2.15.0) binary installer for windows .as on gns3 portal i search but not get i also search on qemu there also its not available.please help me to get it share your QEMU (2.15.0) binary installer with us....

thanks once again


I used the latest binary install from here, it's at the bottom: http://qemu.weilnetz.de/w64/

It should install it in the Program Files folder on Windows under qemu.




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