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[Édouard Thuleau <edouard.thuleau@xxxxxxxxxxxxx>]

Public bug reported:

The Linux bridge (qbr) created by the OVS hybrid vif driver sends usefulness IGMP queries.
By default, Linux bridge activates IGMP snooping onto a switch.

In the case of the Linux bridge was created by the OVS hybrid vif driver, is usefulness.
Because this bridge is only here to be able to apply security groups through netfilter (OVS bridge doesn't use netfilter hooks) and so it contains only 2 interfaces: the VM tap and a side of the veth patch port.
IGMP snooping on a switch of 2 ports is unnecessarily.

Furthermore, the Linux bridge could (I didn't find why and when) send some IGMP queries when the IGMP snooping is activated.
This IGMP queries could unnecessarily pollute the network and the network equipemnts log.

** Affects: nova
     Importance: Undecided
         Status: New


** Tags: libvirt network

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https://bugs.launchpad.net/bugs/1276038

Title:
  Linux bridge create by the OVS hybrid vif driver sends IGMP query

Status in OpenStack Compute (Nova):
  New

Bug description:
  The Linux bridge (qbr) created by the OVS hybrid vif driver sends usefulness IGMP queries.
  By default, Linux bridge activates IGMP snooping onto a switch.

  In the case of the Linux bridge was created by the OVS hybrid vif driver, is usefulness.
  Because this bridge is only here to be able to apply security groups through netfilter (OVS bridge doesn't use netfilter hooks) and so it contains only 2 interfaces: the VM tap and a side of the veth patch port.
  IGMP snooping on a switch of 2 ports is unnecessarily.

  Furthermore, the Linux bridge could (I didn't find why and when) send some IGMP queries when the IGMP snooping is activated.
  This IGMP queries could unnecessarily pollute the network and the network equipemnts log.

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