[Bug 626662] [NEW] KVM images losing connectivity w/bridged network

[Frank Groeneveld]

Public bug reported:

Binary package hint: qemu-kvm

I'm opening a new bug as per Serge Hallyn's request in bug #584048.

I experience problems with one of my KVM virtual machines. I have a host
running Hardy LTS with the KVM backport ppa (1:84+dfsg-
0ubuntu12.1~rc5ppa). The host is using a bridged network with 2 eth's
(only 1 is physically connected) and 2 tap devices (for both of my VMs).
The virtual machine that works without a problem is running Hardy LTS as
well. The machine with problems is running Lucid LTS.

The machines are started as:

screen -t production kvm -m 2048m -nographic -drive
file=production.raw,if=virtio,boot=on -net
nic,macaddr=52:54:00:12:34:xx,model=virtio -net
tap,ifname=tap0,script=no,downscript=no -smp 2

screen -t development kvm -m 1024m -nographic -drive
file=development.raw,if=virtio,boot=on -net
nic,macaddr=52:54:00:12:34:yy,model=virtio -net
tap,ifname=tap1,script=no,downscript=no

Development is the machine giving me problems. After a while (less than
24 hours) of no network activity, the machine loses it's connectivity.
We're currently keeping it "running" by sending a ping request every
minute and this seems to work, but the network seems pretty slow
sometimes.

** Affects: qemu-kvm (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: bridge kvm

** Changed in: qemu-kvm (Ubuntu)
       Status: New => Confirmed

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KVM images losing connectivity w/bridged network
https://bugs.launchpad.net/bugs/626662
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