[Qemu-devel] vde networking

[Qemu-devel] vde networking

[sagsdga adfahdf]

I'm trying to run qemu with vde networking from
http://vde.sourceforge.net

but when I try to run vde, it fails with this error

# vdeq qemu myimage.img
connect: No such file or directory

any ideas?


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Re: [Qemu-devel] vde networking

[Renzo Davoli]

On Mon, Oct 04, 2004 at 09:59:39PM -0500, sagsdga adfahdf wrote:
> I'm trying to run qemu with vde networking from
> http://vde.sourceforge.net
> 
> but when I try to run vde, it fails with this error
> 
> # vdeq qemu myimage.img
> connect: No such file or directory
> 
> any ideas?
You have to start a vde_switch before.

e.g.

# vde_switch -tap tap0 -daemon
# chmod 666 /tmp/vde.ctl

then there is no need for root privileges to start vde:

% vdeq qemu myimage.img

ciao
	renzo

Re: [Qemu-devel] vde networking

[sagsdga adfahdf]

----- Original Message -----
From: renzo@cs.unibo.it (Renzo Davoli)
Date: Tue, 5 Oct 2004 06:02:55 +0200
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] vde networking

> On Mon, Oct 04, 2004 at 09:59:39PM -0500, sagsdga adfahdf wrote:
> > I'm trying to run qemu with vde networking from
> > http://vde.sourceforge.net
> > 
> > but when I try to run vde, it fails with this error
> > 
> > # vdeq qemu myimage.img
> > connect: No such file or directory
> > 
> > any ideas?
> You have to start a vde_switch before.
> 
> e.g.
> 
> # vde_switch -tap tap0 -daemon
> # chmod 666 /tmp/vde.ctl
> 
> then there is no need for root privileges to start vde:
> 
> % vdeq qemu myimage.img
> 

That allows me to boot into the guest OS, then ifconfig, then ping localhost works. 
Then pinging the real router by its IP address does not work ?


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Re: [Qemu-devel] vde networking

[Renzo Davoli]

> That allows me to boot into the guest OS, then ifconfig, then ping localhost works. 
> Then pinging the real router by its IP address does not work ?

Now your host machine is a router between the vde network 
and the real network.

follow a HOWTO on linux networking to find out HOW to configure a router.

e.g. if you want to see the vde network as an internal masqueraded net
you can use something like

# echo "1" > /proc/sys/net/ipv4/ip_forward
# modprobe iptable_nat
# iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

renzo

Re: [Qemu-devel] vde networking

[Jim C. Brown]

On Tue, Oct 05, 2004 at 09:08:23AM -0500, sagsdga adfahdf wrote:
> 
> That allows me to boot into the guest OS, then ifconfig, then ping localhost works. 
> Then pinging the real router by its IP address does not work ?
> 

You need to set up routing (and ip forwarding and possibly NAT).
This is OS dependant. See the VDE-HOWTO for details.

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Infinite precision begets infinite perfection.

Re: [Qemu-devel] vde networking

[sagsdga adfahdf]

Now that I have vde networking operating properly with qemu, when I attempt to reboot the host, it hangs stating that it can't release tap0. How can I fix this?

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Re: [Qemu-devel] vde networking

[Jim C. Brown]

On Wed, Oct 06, 2004 at 05:47:30PM -0500, sagsdga adfahdf wrote:
> 
> Now that I have vde networking operating properly with qemu, when I attempt to reboot the host, it hangs stating that it can't release tap0. How can I fix this?
> 

That is weird. What host OS are you using?

For me I just quit all the guests, then I kill vde_switch via a SIGTERM, (at
this point tap0 should be gone) and then I reboot. Of course I use Redhat which
has the ifdown script (sometimes I manually have to do "ifdown tap0" to get
it to go away).

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Infinite precision begets infinite perfection.