yahoo-eng-team team mailing list archive

[OpenStack Infra <2018737@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/c/openstack/neutron-dynamic-routing/+/882560
Committed: https://opendev.org/openstack/neutron-dynamic-routing/commit/06232f0b2c555578bb983c5cefcd8a573761f87a
Submitter: "Zuul (22348)"
Branch:    master

commit 06232f0b2c555578bb983c5cefcd8a573761f87a
Author: Felix Huettner <felix.huettner@mail.schwarz>
Date:   Mon May 8 11:53:55 2023 +0200

    Ignore disabled routers for advertising
    
    currently if a router is set to disabled the dragents still advertise
    the routes. This causes the upstream routers to still know these routes
    and try to forward packets to a non existing router.
    
    By removing these routes we allow these upstream routers do directly
    drop the traffic to these addresses instead of trying to forward it to
    neutron routers.
    
    Closes-Bug: 2018737
    
    Change-Id: Icd6803769f37a04bf7581afb9722c78a44737374


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

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to neutron.
https://bugs.launchpad.net/bugs/2018737

Title:
  neutron-dynamic-routing announces routes for disabled routers

Status in neutron:
  Fix Released

Bug description:
  neutron routers can be disabled, thereby basically removing them from their l3 agents.
  They will no longer accept, process or forward packets once they are disabled.

  Currently if a router is set to disabled the dragents still advertise the routes to its networks and floating ips.
  Even though the router is actually not active and can not handle these packets.
  This causes the upstream routers to still know these routes and try to forward packets to this disabled router.

  For example for internet network this causes unneeded traffic on the upstream routers and the network nodes.
  They will receive traffic that they forward to the network node which then will drop this traffic as the router is gone.

  It would be ideal if routes for disabled routers are no longer advertised by the dragents.
  This would cause upstream routers to loose the routes to these network/fips and allow them to drop the traffic as early as possible.

To manage notifications about this bug go to:
https://bugs.launchpad.net/neutron/+bug/2018737/+subscriptions