hi there ..
first i'd like to notice, that *i *am *not *subscribed in this mailinglist,
hence i have found at mailinglist info page: "No need to subscribe for a one-off
question, just send an email."
but now let's go on and see what's the problem:
i just need to achieve a NO-CARRIER status on NIC in kvm guest. Sounds easy, but
i've spend with it several hours and now i'm pretty frustrated.
my basic script for launching machine is this:
-----------------------------------------------
qemu-kvm -m 1024 -k en-us -vnc :5 -localtime -hda /home/kvm/opensuse/suse113.iso
-cdrom /home/kvm/opensuse/openSUSE-11.3-DVD-x86_64.iso -boot d \
-net nic,model=e1000,vlan=1 -net tap,ifname=suse0,script=no,vlan=1 \
-net nic,model=e1000,vlan=2 -net tap,ifname=suse1,script=no,vlan=2 \
-monitor unix:/home/kvm/opensuse/instance,server,nowait &
sleep 2;
ip l set suse0 up;
ip l set suse1 up;
ip a a 192.168.88.1/24 dev suse0;
ip a a 192.168.99.1/24 dev suse1;
echo 1 >/proc/sys/net/ipv4/ip_forward;
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE;
iptables -A FORWARD -s 192.168.88.0/24 -o eth0 -j ACCEPT;
-----------------------------------------------
i expected initially, that i could *unplug *virtual *lan *cable by using
qemu/monitor feature (accessible in my case via `nc -6U
/home/kvm/opensuse/instance`) but
i wasn't been able to do that .. i won't list all what i have tested .. the
results were been of course, that i disabled several ways networking on
particular iface,
but wanted and beprayed NO-CARRIER status didn't occur ..
i have also tried to change my *netconfig in starting script as:
-net nic,model=e1000,vlan=1 \
-net nic,model=e1000,vlan=2 -net tap,ifname=suse1,script=no,vlan=2 \
^^ and several more variations, but with no success ..
i'd like in the best case meet a goal, when i'll be able to *{,un}plug wanted
tap.$n device (in qemu/monitor) in runtime ..
i'll be also very happy if i could even configure one of my NICs in guest with
NO-CARRIER anyhow ..
why? i just need to reproduce some buggy behaviour. nothing else then NO-CARRIER
status on NIC in guest could make me happy ..
thank you very much, boys and girls, for KVM .. it's a excellent piece of
software and i'm using it happily several past years.
regards by daniel
Best Regards / S Pozdravem
Daniel Pecka
--------------------------------------------------
UNIX Administrator, SunOS Specialist
www.techniservit.cz
mailto:<dpecka[at]techniservit[dot]cz>//<dpecka[at]opensuse[dot]org>
callto:<+0420603166533>
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