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[Leon Shaw <shaw.leon@xxxxxxxxx>]

Public bug reported:

I'm using kilo under ubuntu14.04-server, ML2 OVS plugin and vxlan setup.
And trying to enable jubmo frames for instances. I've set the parameters
in ml2_conf.ini:

[ml2]
...
path_mtu = 9000
segment_mtu = 9000
...
[agent]
tunnel_types = vxlan


I created a network and the MTU is correct(8950). But when launching instances, the tap interfaces attached to br-int still has MTU 1500 which is not correct. After manually setting it to 8950, everything works fine.

Seems similar to https://bugs.launchpad.net/networking-
cisco/+bug/1443607 , but is OVS plugin case.

** Affects: neutron
     Importance: Undecided
         Status: Incomplete

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https://bugs.launchpad.net/bugs/1517437

Title:
  OVS plugin: tap interface MTU on compute node is not correct

Status in neutron:
  Incomplete

Bug description:
  I'm using kilo under ubuntu14.04-server, ML2 OVS plugin and vxlan
  setup. And trying to enable jubmo frames for instances. I've set the
  parameters in ml2_conf.ini:

  [ml2]
  ...
  path_mtu = 9000
  segment_mtu = 9000
  ...
  [agent]
  tunnel_types = vxlan

  
  I created a network and the MTU is correct(8950). But when launching instances, the tap interfaces attached to br-int still has MTU 1500 which is not correct. After manually setting it to 8950, everything works fine.

  Seems similar to https://bugs.launchpad.net/networking-
  cisco/+bug/1443607 , but is OVS plugin case.

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