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Description of problem:
If the VM NIC is virtio based, PXE boot fails. e1000 works OK, though.
Version-Release number of selected component (if applicable):
qemu-kvm-0.12.1.2-2.90.el6.x86_64
How reproducible:
Every time.
Steps to Reproduce:
1. Create an empty VM, set RHEL6 as the VM type
2. Try to PXE boot via a bridged interface
Actual results:
For virtion:
gPXE> dhcp net0
DHCP (net0 52:54:00:56:4e:1f)................ Connection timed out (0x4c106035)
Could not configure net0: Connection timed out (0x4c106035)
However, setting it to e1000:
gPXE> dhcp net0
DHCP (net0 52:54:00:56:4e:1f)................ ok
gPXE>
Expected results:
Should work for both virtio and emulated NICs.
(In reply to comment #3)
> I don't think they are related per se. This is about DHCP failing.
> https://bugzilla.redhat.com/show_bug.cgi?id=632716 is about the tftp boot
> failing. This is lower level than that.
Ah, I see now. This is due to the bridge delay. Glauber, Dan, any ideas how to resolve this?
There's not enough information here really.
Please provide the full libvirt XML for the guest, and the corresponding /var/log/libvirt/qemu/$GUEST.log file
Also provide info on the host networking setup from
ifconfig -a
brctl show
brctl showstp $BRIDGENAME
sysctl -a | grep ip_forward
iptables -L -n -v
iptables -t nat -L -n -v
Finally what libvirt RPM version is present.