Can you check is this patch does the right thing[1]: [1] https://review.openstack.org/#/c/112523/6 ----- Original Message ----- > From: "Fredy Neeser" <Fredy.Neeser at solnet.ch> > To: openstack-dev at lists.openstack.org > Sent: Friday, March 6, 2015 6:01:08 PM > Subject: [openstack-dev] [neutron] VXLAN with single-NIC compute nodes: Avoiding the MTU pitfalls > > Hello world > > I recently created a VXLAN test setup with single-NIC compute nodes > (using OpenStack Juno on Fedora 20), conciously ignoring the OpenStack > advice of using nodes with at least 2 NICs ;-) . > > The fact that both native and encapsulated traffic needs to pass through > the same NIC does create some interesting challenges, but finally I got > it working cleanly, staying clear of MTU pitfalls ... > > I documented my findings here: > > [1] > http://blog.systemathic.ch/2015/03/06/openstack-vxlan-with-single-nic-compute-nodes/ > [2] > http://blog.systemathic.ch/2015/03/05/openstack-mtu-pitfalls-with-tunnels/ > > For those interested in single-NIC setups, I'm curious what you think > about [1] (a small patch is needed to add "VLAN awareness" to the > qg-XXX Neutron gateway ports). > > > While catching up with Neutron changes for OpenStack Kilo, I came across > the in-progress work on "MTU selection and advertisement": > > [3] Spec: > https://github.com/openstack/neutron-specs/blob/master/specs/kilo/mtu-selection-and-advertisement.rst > [4] Patch review: https://review.openstack.org/#/c/153733/ > [5] Spec update: https://review.openstack.org/#/c/159146/ > > Seems like [1] eliminates some additional MTU pitfalls that are not > addressed by [3-5]. > > But I think it would be nice if we could achieve [1] while coordinating > with the "MTU selection and advertisement" work [3-5]. > > Thoughts? > > Cheers, > - Fredy > > Fredy ("Freddie") Neeser > http://blog.systeMathic.ch > > > __________________________________________________________________________ > OpenStack Development Mailing List (not for usage questions) > Unsubscribe: OpenStack-dev-request at lists.openstack.org?subject:unsubscribe > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev >