Thanks for submitting this bug.
The redhat page you linked suggests that the checksum-fill iptables rule
should solve the problem. When I start a 12.04 or 12.10 server, sudo
iptables -L -t mangle shows
CHECKSUM udp -- anywhere anywhere udp
dpt:bootpc CHECKSUM fill
Is that rule not present on your systems? If so, have you removed the
virbr0 NATed bridge? When I remove that from autostart and reboot, I do
not see the rule.
Assuming I understand this right, does that mean we should have the
libvirt-bin upstart job always unconditionally add that rule?
** Changed in: libvirt (Ubuntu)
Importance: Undecided => High
** Changed in: libvirt (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1029430
Title:
KVM guests networking issues when bridge and vhost_net kernel modules
loaded
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