Re: How to create a simple tap0 interface using nmcli

[Dan Williams]

On Mon, 2016-01-25 at 12:21 +, Vincent Fortier wrote:
> Thnx.  So lets say I previously created a bridge interface and linked
> in my
> eth0:
> $ nmcli connection show
> $ nmcli connection delete 
> $ nmcli connection add type bridge \
>  ifname br0 con-name br0
> $ nmcli connection add type bridge-slave \
>  ifname eth0 con-name eth0 master br0
> 
> Presumably I create tap0 then add it to my br0 such as the following:
> 
> $ nmcli connection add type tun \
> 
>   ifname tap0 con-name tap0 \
> 
>   mode tap owner `id -u` ip4 0.0.0.0/24
> $ nmcli connection add type bridge-slave \
>   ifname tap0 con-name tap0 master br0

Here you're creating two separate network profiles.  You only need to
create one profile for tap0 that includes the bridge-slave bits:

$ nmcli connection add type tun \
 ifname tap0 con-name tap0 \
 slave-type bridge master br0 \
 mode tap owner `id -u` ip4 0.0.0.0/24

or:

$ nmcli connection add type tun \
  ifname tap0 con-name tap0 \
  mode tap owner `id -u` ip4 0.0.0.0/24
$ nmcli connection mod tap0 connection.slave-type bridge \
  connection.master br0

'nmcli con add type <*-slave>' is just a short-cut to fill slave-type
for you.  The major point is that whenever you use "nmcli con add" it
will create a *new* connection profile.  You want to either put all
properties in one 'nmcli con add' or you can use 'nmcli con mod' to set
them after creation.

Dan

> Then I would be good to go with qemu and be all-set "automagically"
> at
> every reboot as autoconnect=yes is set by default.
> 
> NM1.2 not yet available under Ubuntu 16.04 alpha (duno if planned to
> be
> included?) so can't test it unless I recompile from source. 
>  Therefore in
> the meantime it's more of a personnal knowledge thing than anything
> else.
> 
> Thnx in advance!
> 
> - vin
> 
> Le lun. 25 janv. 2016 à 03:22, Beniamino Galvani  > a
> écrit :
> 
> > On Mon, Jan 25, 2016 at 02:46:54AM +, Vincent Fortier wrote:
> > > I was wondering how can I create a tap interface using nmcli? 
> > >  Search
> > again
> > > and again witouth luck...
> > 
> > Hi,
> > 
> > creation of tun/tap devices is supported only in NetworkManager
> > 1.2.
> > On such version you can create a tap connection using the command:
> > 
> >  $ nmcli connection add type tun ifname tap0 con-name mytap0 \
> > mode tap owner `id -u` ip4 x.x.x.x/24
> > 
> > The connection will have autoconnect=yes by default and so the
> > device
> > will be created automatically every time NM starts. You can
> > manually
> > enable or disable the connection with:
> > 
> >  $ nmcli connection up mytap0
> >  $ nmcli connection down mytap0
> > 
> > Beniamino
> > 
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Re: How to create a simple tap0 interface using nmcli

[Beniamino Galvani]

On Mon, Jan 25, 2016 at 02:46:54AM +, Vincent Fortier wrote:
> I was wondering how can I create a tap interface using nmcli?  Search again
> and again witouth luck...

Hi,

creation of tun/tap devices is supported only in NetworkManager 1.2.
On such version you can create a tap connection using the command:

 $ nmcli connection add type tun ifname tap0 con-name mytap0 \
mode tap owner `id -u` ip4 x.x.x.x/24

The connection will have autoconnect=yes by default and so the device
will be created automatically every time NM starts. You can manually
enable or disable the connection with:

 $ nmcli connection up mytap0
 $ nmcli connection down mytap0

Beniamino


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Re: How to create a simple tap0 interface using nmcli

[Vincent Fortier]

Thnx.  So lets say I previously created a bridge interface and linked in my
eth0:
$ nmcli connection show
$ nmcli connection delete 
$ nmcli connection add type bridge \
 ifname br0 con-name br0
$ nmcli connection add type bridge-slave \
 ifname eth0 con-name eth0 master br0

Presumably I create tap0 then add it to my br0 such as the following:

$ nmcli connection add type tun \

  ifname tap0 con-name tap0 \

  mode tap owner `id -u` ip4 0.0.0.0/24
$ nmcli connection add type bridge-slave \
  ifname tap0 con-name tap0 master br0

Then I would be good to go with qemu and be all-set "automagically" at
every reboot as autoconnect=yes is set by default.

NM1.2 not yet available under Ubuntu 16.04 alpha (duno if planned to be
included?) so can't test it unless I recompile from source.  Therefore in
the meantime it's more of a personnal knowledge thing than anything else.

Thnx in advance!

- vin

Le lun. 25 janv. 2016 à 03:22, Beniamino Galvani  a
écrit :

> On Mon, Jan 25, 2016 at 02:46:54AM +, Vincent Fortier wrote:
> > I was wondering how can I create a tap interface using nmcli?  Search
> again
> > and again witouth luck...
>
> Hi,
>
> creation of tun/tap devices is supported only in NetworkManager 1.2.
> On such version you can create a tap connection using the command:
>
>  $ nmcli connection add type tun ifname tap0 con-name mytap0 \
> mode tap owner `id -u` ip4 x.x.x.x/24
>
> The connection will have autoconnect=yes by default and so the device
> will be created automatically every time NM starts. You can manually
> enable or disable the connection with:
>
>  $ nmcli connection up mytap0
>  $ nmcli connection down mytap0
>
> Beniamino
>
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How to create a simple tap0 interface using nmcli

[Vincent Fortier]

I was wondering how can I create a tap interface using nmcli?  Search again
and again witouth luck...

Otherwise I use currently:

$ sudo openvpn --mktun --dev tap0 --user `id -un`

$ sudo ip addr add 0.0.0.0/24 dev tap0

$ sudo ip link set tap0 up promisc on


or simply:

$ sudo tunctl -d tap0


Thnx in advance!


- vin
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