On Sun, May 2, 2010 at 9:14 PM, Dan Johansson <kvm@xxxxxx> wrote:
> Hi, It's me again.
>
> After some time with a lot to do outside the computer world, I am now
> continuing my "KVM-Project". I have gotten all my KVM-Guest to run separately,
> but when I try to start more then one at the same time I get the following
> error message and the second Guest does not start:
>
> warning: could not configure /dev/net/tun: no virtual network emulation
>
> The scripts used to start the Guests looks like this:
> Guest-A:
> kvm \
> -net nic,vlan=1,model=rtl8139,macaddr=DE:ED:BE:EF:01:04 -net
> tap,vlan=1,ifname=qtap1,script=no,downscript=no \
> -net nic,vlan=3,model=rtl8139,macaddr=DE:ED:BE:EF:03:04 -net
> tap,vlan=3,ifname=qtap3,script=no,downscript=no \
> -m 2048 -k de-ch -vnc :4 -daemonize \
> Robbie.qcow2
>
> Guest-B:
> kvm \
> -net nic,vlan=1,model=rtl8139,macaddr=DE:ED:BE:EF:01:03 -net
> tap,vlan=1,ifname=qtap1,script=no,downscript=no \
> -net nic,vlan=3,model=rtl8139,macaddr=DE:ED:BE:EF:03:03 -net
> tap,vlan=3,ifname=qtap3,script=no,downscript=no \
> -m 2048 -k de-ch -vnc :3 -daemonize \
> Wilmer.qcow2
>
> I suspect that something is not 100% correct with my network setup.
> I want both of the Guest to be able to access the same qtap's (1 and 3).
> br1 = qtap1 + eth1
> br3 = qtap3 + eth3
>
> Is it not possible to use the same qtap for two different Guests?
No, all the 'ifname' should be different.
try this:
--------
Guest-A:
kvm \
-net nic,vlan=1,model=rtl8139,macaddr=DE:ED:BE:EF:01:04 -net
tap,vlan=1,ifname=qtap1,script=no,downscript=no \
-net nic,vlan=3,model=rtl8139,macaddr=DE:ED:BE:EF:03:04 -net
tap,vlan=3,ifname=qtap3,script=no,downscript=no \
-m 2048 -k de-ch -vnc :4 -daemonize \
Robbie.qcow2
Guest-B:
kvm \
-net nic,vlan=1,model=rtl8139,macaddr=DE:ED:BE:EF:01:03 -net
tap,vlan=1,ifname=qtap1b,script=no,downscript=no \
-net nic,vlan=3,model=rtl8139,macaddr=DE:ED:BE:EF:03:03 -net
tap,vlan=3,ifname=qtap3b,script=no,downscript=no \
-m 2048 -k de-ch -vnc :3 -daemonize \
Wilmer.qcow2
~
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