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[OpenStack Infra <1900934@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/c/openstack/neutron/+/776567
Committed: https://opendev.org/openstack/neutron/commit/56e8498a4dac9e4db6185cc5d97612d824c6e8d5
Submitter: "Zuul (22348)"
Branch:    master

commit 56e8498a4dac9e4db6185cc5d97612d824c6e8d5
Author: LIU Yulong <i@xxxxxxxxxxxx>
Date:   Fri Jun 28 10:55:01 2019 +0800

    Add agent extension 'dhcp' for ovs agent
    
    Add a new ovs agent extension to support distributed DHCP for
    VMs in compute nodes directly. For large scale deployment, this
    can be used to reduce the number of neutron agents. Large scale
    cloud can benefit from it.
    
    From the perspective of virtual machine, this will reduce the
    probability of DHCP request failure. The VMs will get a higher
    level availability for DHCP R/R, no single point of failure
    permanently. If one host goes down, VMs in other hosts will not
    be influnced by it.
    
    For the perspective of network performance, after using this
    extension, the DHCP broadcasting packages will be limited
    to the host locally.
    
    Partially-Implements: bp/distributed-dhcp-for-ml2-ovs
    Closes-Bug: #1900934
    Change-Id: Id8a4c501daad7c2185e6d69441182666ef987e61


** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1900934

Title:
  [RFE][DHCP][OVS] flow based DHCP

Status in neutron:
  Fix Released

Bug description:
  Add a new ovs agent extension to support fully distributed DHCP for VMs in compute nodes, especially for large scale cloud. We had some disscussions during Shanghai PTG:
  https://etherpad.opendev.org/p/Shanghai-Neutron-Planning-restored
  http://lists.openstack.org/pipermail/openstack-discuss/2019-November/010702.html
  https://github.com/gotostack/shanghai_ptg/blob/master/shanghai_neutron_ptg_topics_liuyulong.pdf

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