On Mon, Oct 27, 2014 at 4:42 AM, Ihar Hrachyshka <ihrac...@redhat.com> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA512 > > On 27/10/14 02:18, Li Tianqing wrote: >> Hello, Right now, we test neutron under havana release. We >> configured network_device_mtu=1450 in neutron.conf, After create >> vm, we found the vm interface's mtu is 1500, the ping, ssh, is ok. >> But if we scp large file between vms then scp display 'stalled'. >> And iperf is also can not completed. If we configured vm's mtu to >> 1450, then iperf, scp all is ok. If we iperf with -M 1300, then the >> iperf is ok too. The vms path mtu discovery is set by default. I do >> not know why the vm whose mtu is 1500 can not send large file. > > There is a neutron spec currently in discussion for Kilo to finally > fix MTU issues due to tunneling, that also tries to propagate MTU > inside instances: https://review.openstack.org/#/c/105989/ > This is something which would be quite fantastic to land in Kilo, as multiple people have been bit by this particular issue.
> /Ihar > -----BEGIN PGP SIGNATURE----- > Version: GnuPG/MacGPG2 v2.0.22 (Darwin) > > iQEcBAEBCgAGBQJUThORAAoJEC5aWaUY1u571u4H/3EqEVPL1Q9KgymrudLpAdRh > fwNarwPWT8Ed+0x7WIXAr7OFXX1P90cKRAZKTlAEEI94vOrdr0s608ZX8awMuLeu > +LB6IA7nMpgJammfDb8zNmYLHuTQGGatXblOinvtm3XXIcNbkNu8840MTV3y/Jdq > Mndtz69TrjTrjn7r9REJ4bnRIlL4DGo+gufXPD49+yax1y/woefqwZPU13kO6j6R > Q0+MAy13ptg2NwX26OI+Sb801W0kpDXby6WZjfekXqxqv62fY1/lPQ3oqqJBd95K > EFe5NuogLV7UGH5vydQJa0eO2jw5lh8qLuHSShGcDEp/N6oQWiDzXYYYoEQdUic= > =jRQ/ > -----END PGP SIGNATURE----- > > _______________________________________________ > OpenStack-dev mailing list > OpenStackfirstname.lastname@example.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev _______________________________________________ OpenStack-dev mailing list OpenStackemail@example.com http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev