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[OpenStack Infra <1690165@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/464020
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=96c5dd6a2b9610d345c8e7df73f25820b5041360
Submitter: Jenkins
Branch:    master

commit 96c5dd6a2b9610d345c8e7df73f25820b5041360
Author: Ihar Hrachyshka <ihrachys@xxxxxxxxxx>
Date:   Thu May 11 08:08:42 2017 -0700

    Wait 2 seconds between gratuitous ARP updates instead of 1 second
    
    An unfortunate scenario in Linux kernel may end up with no gratuitous
    ARP update being processed by network peers, resulting in connectivity
    recovery slowdown when moving an IP address between devices.
    
    Change-Id: Iefd0d01d12d06ce6398c4c5634c634991a78bbe9
    Closes-Bug: #1690165


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

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https://bugs.launchpad.net/bugs/1690165

Title:
  Gratutuious ARP updates sent by Neutron L3 agent may be ignored by
  Linux peers

Status in neutron:
  Fix Released

Bug description:
  An ufortunate scenario in Linux kernel explained in
  https://patchwork.ozlabs.org/patch/760372/ may result in no gARP being
  honoured by Linux network peers. To work the kernel bug around, we may
  want to spread updates more, not to hit default kernel locktime which
  is 1s.

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