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Hi Everybody,

I want to discuss on https://bugs.launchpad.net/neutron/+bug/1348589.This
is there for more than a year and no discussion i could find on this.

*Scenario:*
ovs-agent is down and then a network and subnet under this newly created
network are created using cli. No error visible to user, but following
irregularities are found.

*Discrepancies:*
1. neutron port-show <dhcp-port> shows:
     binding:vif_type      | binding_failed
2. Running "ovs-ofctl dump-flows br-tun", no of-flow got added
3. Running "ovs-vsctl show br-int", no tag for dhcp-port.

neutron db will have all the attributes required to retry vif binding.My
query is when should we trigger this rebinding.Two approaches i could think
of are:
1> At neutron server restart, for all ports with vif_type as
 "binding_failed" plugins/ml2/drivers/mech_agent.bind_port can be invoked
as a sync up activity.

2> In neutron port update api,
http://developer.openstack.org/api-ref-networking-v2-ext.html , could be
enhanced to receive vif binding related options also and then
eventually plugins/ml2/drivers/mech_agent.bind_port can be
invoked.Corresponding changes will be made to 'port update cli' also.

Please suggest.
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