Comments on: Installing Tun Tap Driver on Leopard

By: Johan Havermans

Johan Havermans — Wed, 26 Oct 2011 11:25:00 +0000

Greg et al,
I failed in getting the tuntap drivers working on Mac OSX 10.7 Lion and also in connecting DynaMIPS (embedded in GNS3) to my virtual machines (Parallels Desktop / VirtualBox) and connect my virtual LAN to my real LAN.
At the end, I got it all working.
Since I did spent quite some time on this website to figure out how to get it work in Lion. I documented what I did and it might be useful for others to post it here:

http://forum.gns3.net/topic4206.html?sid=6ebdb861bfceebd5c94e96a525167768

Good luck

Johan

By: Nick B.

Nick B. — Wed, 15 Dec 2010 19:06:12 +0000

Just to add that the tuntap version I used was tuntap_20090913.tar.

By: Nick B.

Nick B. — Wed, 15 Dec 2010 19:03:46 +0000

Thanks Greg for some must useful articles.

I’ve just succeeded getting the tuntap drivers to work on my system, Snow Leopard 10.6.5.
I downloaded the tuntaposx installer from http://sourceforge.net/projects/tuntaposx/wp-content/uploads/

Connection to the tuntap via Dynamips version 0.2.8-RC2-x86 in a Dynagen.net file was as per your
example. My only error was giving tun0 and the router ip addresses in the same subnet as my
other active OSX interface en1, once I’d corrected that it all works. I can now access the router with SDM V2.5 – this runs on OSX after copying the directory over from a Windows installation!

By: GeorgeM

GeorgeM — Thu, 11 Feb 2010 05:47:35 +0000

Can you have multiple Tap interfaces and trunk these Tap interfaces to a Cisco switch?

Also, was anybody succesfull in using Dynagen/Dynamips with Virtual Interfaces on Mac OS 10.5.8? I was able to create the virtual interfaces, assign the proper tagging, bind 2 routers (R2 to vlan2 and R3 to vlan3) in the Dynagen’s .net file but I wasn’t able to ping R3 from R2.
Any ideas?

By: Jesse

Jesse — Sun, 27 Sep 2009 19:11:58 +0000

Hi,

When I install the Tun Tap drivers, I can only see “tap0-15″ and no “tun” when using the “ls -la /dev” command. I am running Mac OS X 10.5.8. I need help.

By: duga

duga — Sat, 27 Jun 2009 15:04:28 +0000

Hi Andreas,

It’s already works great, thanks for all of you guys

Regards,

duga

By: duga

duga — Sat, 27 Jun 2009 14:17:28 +0000

Hi Andreas,

I already download the driver also, but I failed to bring up the tap interface using #ifconfig tap0 plumb
I can see the tapX and tunX on /dev
Can you please show the step by step installation?

Thanks,

duga

By: Andreas

Andreas — Wed, 15 Apr 2009 10:33:26 +0000

Hello All,

I’ve just downloaded tuntap_20080804.tar.gz from Sourceforge and I can confirm that it works perfectly with dynamips-0.2.7-RC3-OSX-intel-bin.zip on a MacBook running OSX 10.5.6.

I can ping a tap0 assigned IP address from a virtual router and visa versa.

One problem I did have was when the tap0 interface was in the same subnet that the notebook is in, i.e. 192.168.1.x/24.

When I assigned the tap0 interface the IP address of a different subnet, e.g. 192.168.2.x/24, it worked as expected. It goes without saying that the virtual router’s interface needs to be in the same subnet.

Many thanks for this very useful article.

Andreas

By: Scott V

Scott V — Tue, 10 Mar 2009 06:03:22 +0000

I have never had success with Tun/Tap for OS X – neither in Tiger before nor Leopard now.

By: John

John — Sun, 08 Mar 2009 17:00:20 +0000

That is not true. The kernel extensions installed by http://tuntaposx.sourceforge.net do work under Leopard. I’m using them with Dynagen now and the process for setting up is still the same.

By: Greg Ferro

Greg Ferro — Thu, 12 Feb 2009 21:06:18 +0000

Yep, you are right. The TUN/TAP drivers no longer work under Leopard. This article is probably useless and is no longer relevant.

By: bdelano

bdelano — Sat, 07 Feb 2009 09:41:47 +0000

I am getting the same 206 error in dynamips and when I try to create a tap interface [sudo ifconfig tap0 create] i get “SIOCIFCREATE: Invalid argument”. I can see the kext are installed but it doesn’t look like leopard is playing nice. Has anyone got this to work with 10.5.6?

Output:
laptop:Downloads bdelano$ kextstat | egrep “tun|tap”
118 0 0x56b6e000 0×6000 0×5000 foo.tun (1.0)
119 0 0x56b74000 0×6000 0×5000 foo.tap (1.0)
laptop:Downloads bdelano$ sudo ifconfig tap0 create
Password:
ifconfig: SIOCIFCREATE: Invalid argument

By: CaitSith

CaitSith — Sat, 24 Jan 2009 18:18:15 +0000

I have the same “206-unable to create TAP NIO” error message using GNS3 and the sourceforge version of TunTap drivers.
Greg Ferro, can you help?
Thank you

By: Greg Ferro

Greg Ferro — Sun, 14 Dec 2008 18:09:58 +0000

Did these instructions work for that software – its a long time ago, but I remember having problems with the sourceforge version.

By: packeteer

packeteer — Mon, 08 Dec 2008 00:33:05 +0000

http://tuntaposx.sourceforge.net/ < best source for tun tap driver (your original link is dead)

By: Brandon Carroll

Brandon Carroll — Fri, 07 Nov 2008 00:50:58 +0000

Hey Greg,

I followed these directions but get this message when i start the lab:

es/dynagen ‘/Users/brandoncarroll/Documents/dynalab/labs/ipsec_ha.net’ ; exit
Reading configuration file…

*** Warning: Connecting SW2 port 4 to access 3 NIO_tap:/dev/tap0 resulted in:
206-unable to create TAP NIO

*** Error: errors during loading of the topology file, please correct them
Press ENTER to continue

When I do an ls in the /dev directory I see the tun and taps. Any idea what I may be doing wrong?

Thanks

Brandon

By: Gian Paolo

Gian Paolo — Fri, 26 Sep 2008 20:42:07 +0000

Worked flawlessly on my iMac. Thank you.

By: Lucas

Lucas — Mon, 07 Jul 2008 20:28:31 +0000

You are my hero!!!

Thanks for this great info. Is there any way to access the internet with the router? In a nutshell, I want to make my MAC to act as an ISP using the tap driver.

Thanks again!
Best,
Lucas

By: Dirk

Dirk — Thu, 01 May 2008 16:58:13 +0000

Hello Greg,

Just want to say “Thank you!” for this very useful howto!

Cheers, Dirk