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[Yi Yang <1931953@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

This will use openflow to implement neutron l3 agent for DVR mode.

It will implement the below functions:

1. ARP Reply for local VMs.
2. ARP Reply for qrouter port.
3. ICMPv4 & v6 Reply for qrouter port.
4. Routing between VMs.
5. ARP request for remote FIP or FIP gateway triggered by packet_in2.
6. Enhance os_ken to handle advanced packet_in (https://review.opendev.org/c/openstack/os-ken/+/795963)
7. Openflow-based FIP (without iptables/conntrack involved)
8. Keep namespace based implementation there for smooth transition and debug (you still can use namespaces to connect to VMs)
9. Openflow-based FIP port forwarding.

All these functions are implemented by openflow in br-int. neutron ovs
agent and neutron l3 agent and os_ken will be changed to support this.
neutron AIPs won't have any change.

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: xena

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https://bugs.launchpad.net/bugs/1931953

Title:
  [RFE] Openflow-based DVR L3

Status in neutron:
  New

Bug description:
  This will use openflow to implement neutron l3 agent for DVR mode.

  It will implement the below functions:

  1. ARP Reply for local VMs.
  2. ARP Reply for qrouter port.
  3. ICMPv4 & v6 Reply for qrouter port.
  4. Routing between VMs.
  5. ARP request for remote FIP or FIP gateway triggered by packet_in2.
  6. Enhance os_ken to handle advanced packet_in (https://review.opendev.org/c/openstack/os-ken/+/795963)
  7. Openflow-based FIP (without iptables/conntrack involved)
  8. Keep namespace based implementation there for smooth transition and debug (you still can use namespaces to connect to VMs)
  9. Openflow-based FIP port forwarding.

  All these functions are implemented by openflow in br-int. neutron ovs
  agent and neutron l3 agent and os_ken will be changed to support this.
  neutron AIPs won't have any change.

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