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[OpenStack Infra <1651126@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/430212
Committed: https://git.openstack.org/cgit/openstack/openstack-manuals/commit/?id=d7c4804de6fb945b35e4e1c2a586259a7908d886
Submitter: Jenkins
Branch:    master

commit d7c4804de6fb945b35e4e1c2a586259a7908d886
Author: John Davidge <john.davidge@xxxxxxxxxxxxx>
Date:   Tue Feb 7 11:34:01 2017 +0000

    [networking] MTU updates on l3-agent restart
    
    Note that new MTU calculations will propogate after l3-agent restart
    when using certain drivers.
    
    Change-Id: I5adc9b19cf9e9dfbcd221a3012839a4ffa68afde
    Closes-Bug: #1651126


** Changed in: openstack-manuals
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1651126

Title:
      Update MTU on existing devices

Status in neutron:
  Confirmed
Status in openstack-manuals:
  Fix Released

Bug description:
  https://review.openstack.org/405532
  Dear bug triager. This bug was created since a commit was marked with DOCIMPACT.
  Your project "openstack/neutron" is set up so that we directly report the documentation bugs against it. If this needs changing, the docimpact-group option needs to be added for the project. You can ask the OpenStack infra team (#openstack-infra on freenode) for help if you need to.

  commit 5c8dffa7fb6c95a04a7b50c7d6e63c9a2729231b
  Author: Ihar Hrachyshka <ihrachys@xxxxxxxxxx>
  Date:   Tue Nov 29 22:24:29 2016 +0000

      Update MTU on existing devices
      
      This patch makes OVS and Linuxbridge interface drivers to set MTU on
      plug() attempt if the device already exists. This helps when network MTU
      changes (which happens after some configuration file changes).
      
      This will allow to update MTU values on agent restart, without the need
      to bind all ports to new nodes, that would involve migrating agents. It
      will also help in case when you have no other nodes to migrate to (in
      single node mode).
      
      Both OVS and Linuxbridge interface drivers are updated.
      
      Other drivers (in-tree IVS as well as 3party drivers) will use the
      default set_mtu implementation, that only warns about the missing
      feature (once per process startup).
      
      DocImpact suggest to restart agents after MTU config changes instead of
                rewiring router/DHCP ports.
      
      Related: If438e4816b425e6c5021a55567dcaaa77d1fffff
      Related: If09eda334cddc74910dda7a4fb498b7987714be3
      Closes-Bug: #1649845
      Change-Id: I3c6d6cb55c5808facec38f87114c2ddf548f05f1

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