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[Zhangruochen <1843425@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

when restart ovs-agent, br-int lose flows ephemerally due to unnecessary
flow operation.

In _add_port_tag_info[1]，type of lvm.vlan is int and
other_config.get('tag') is a str, they can never be equal. We should do
type conversion for lvm.vlan before comparing to avoid unnecessary
operation of ovsdb and flows.

[1]
https://github.com/openstack/neutron/blob/master/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py#L1063-L1070

** Affects: neutron
     Importance: Undecided
         Status: New

** Description changed:

  when restart ovs-agent, br-int lose flows ephemerally due to unnecessary
  flow operation.
  
  In _add_port_tag_info[1]，type of lvm.vlan is int and
  other_config.get('tag') is a str, they can never be equal. We should do
  type conversion for lvm.vlan before comparing to avoid unnecessary
  operation of ovsdb and flows.
  
  [1]
- https://github.com/openstack/neutron/blob/master/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py#L1063
+ https://github.com/openstack/neutron/blob/master/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py#L1063-L1070

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https://bugs.launchpad.net/bugs/1843425

Title:
  br-int lose flows ephemerally due to unnecessary flow operation

Status in neutron:
  New

Bug description:
  when restart ovs-agent, br-int lose flows ephemerally due to
  unnecessary flow operation.

  In _add_port_tag_info[1]，type of lvm.vlan is int and
  other_config.get('tag') is a str, they can never be equal. We should
  do type conversion for lvm.vlan before comparing to avoid unnecessary
  operation of ovsdb and flows.

  [1]
  https://github.com/openstack/neutron/blob/master/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py#L1063-L1070

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