On Thu, Jul 18, 2013 at 12:30:19AM +0800, Qiu Yu wrote:
On Thu, Jul 18, 2013 at 12:15 AM, Ben Pfaff <blp@nicira.com> wrote:
On Wed, Jul 17, 2013 at 6:06 AM, Qiu Yu <unicell@gmail.com> wrote:
After some digging in openvswitch code. My wild guess is that vlan tag reconfiguring triggered iface_configure_qos (vswitchd/bridge.c), which in turn called netdev_set_policing to reset ingress policing rate. Although there's no ingress_policing_rate set in my case, existing ingress qdisc still remove by default.
The OVS database in general specifies state, not actions. That is, if you set no ingress_policing_rate, then OVS takes that to mean that it should turn off ingress policing, so it does.
I see. So ingress policing managed outside of OVS, which is libvirt in my case, is overridden (no ingress_policing_rate by default, means turned off) by OVS.
My question, however, is there any workaround, to preserve or inherit the ingress policing managed outside of OVS after vlan tagging the device?
OVS doesn't have one now. We'd take a patch to introduce one. "VLAN tagging the device" is a bit of a misunderstanding. This behavior will take place on any change to Open vSwitch configuration. VLAN tagging is just the one example that you have encountered.