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[Launchpad Bug Tracker <2073872@xxxxxxxxxxxxxxxxxx>]

[Expired for neutron because there has been no activity for 60 days.]

** Changed in: neutron
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/2073872

Title:
  Neutron L3 agent not create ECMP in HA router but in single mode is ok

Status in neutron:
  Expired

Bug description:
  Openstack version: Yoga
  OS: Ubuntu 20.04
  Deployment with kolla-ansible multinode.

  Following: https://specs.openstack.org/openstack/neutron-
  specs/specs/wallaby/l3-router-support-ecmp.html

  I used command: `openstack router add route --route
  destination=10.10.10.12/32,gateway=10.10.10.53 --route
  destination=10.10.10.12/32,gateway=10.10.10.42
  fd19eef2-0cc6-4e91-8a30-0a7e4c492c3d`

  In L3 HA mode route table in router:

  ```
  10.10.10.0/24 dev qr-84f2eaa6-d9 proto kernel scope link src 10.10.10.1
  10.10.10.12 via 10.10.10.53 dev qr-84f2eaa6-d9 proto 112
  10.10.10.12 via 10.10.10.42 dev qr-84f2eaa6-d9 proto 112
  10.211.0.0/16 dev qr-62eaee5e-6a proto kernel scope link src 10.211.3.236
  169.254.0.0/24 dev ha-8810cfd1-6c proto kernel scope link src 169.254.0.221
  169.254.192.0/18 dev ha-8810cfd1-6c proto kernel scope link src 169.254.192.101
  ```

  Besides, when I delete first route(in ecmp route) with command:

  `openstack router remove route --route
  destination=10.10.10.12/32,gateway=10.10.10.53
  fd19eef2-0cc6-4e91-8a30-0a7e4c492c3d`

  response is ok, but route not deleted in router namespace. Next I
  delete last route, response ok again and this route is deleted. So
  only first route is exist.

  
  Follow add route commands above, In L3 single (not HA mode) route table in router:

  ```
  10.0.0.0/24 dev qr-6a3a4bca-cb proto kernel scope link src 10.0.0.1
  10.0.0.108 proto static
          nexthop via 10.0.0.185 dev qr-6a3a4bca-cb weight 1
          nexthop via 10.0.0.168 dev qr-6a3a4bca-cb weight 1
  ```

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