http://techbackground.blogspot.co.uk/2013/06/path-mtu-discovery-and-gre.html
-----Original Message----- From: James Page [mailto:james.p...@ubuntu.com] Sent: Wednesday, October 02, 2013 9:17 AM To: openstack@lists.openstack.org Subject: Re: [Openstack] Directional network performance issues with Neutron + OpenvSwitch -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Hi Jay On 02/10/13 16:37, Jay Pipes wrote: > Hi James, have you tried setting the MTU to a lower number of bytes, > instead of a higher-than-1500 setting? Say... 1454 instead of 1546? > > Curious to see if that resolves the issue. If it does, then perhaps > there is a path somewhere that had a <1546 PMTU? Do you mean in instances, or on the physical servers? For context I hit this problem prior to tweaking MTU's (defaults of 1500 everywhere). - -- James Page Ubuntu and Debian Developer james.p...@ubuntu.com jamesp...@debian.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJSTEcPAAoJEL/srsug59jDJg0P/3Qa2IBgbbRDJ0qyoRKJIasY apeI1ocxBSQiMu/T+8lcjaJj5ucz3l8LZrZGBe+0mHtEIzwOma7Lyie47GIPHopJ I7oalNHY20sipbtljraA4HFfondDjXL9DCSQNAotiY2sD+QqHWG4oZ55IH/lh/fs HfUb7WrOclQVK16WKn8fRmot3qx1tR2TNDhbp1WGGDqZxRPJa1xBXiw6FhSandcs /uruaEIw8lZFvtLOiOhLLH5JErPZOAE4SZHTUuF56AtEthfMZLIzFrMrwV+cqcS5 8z/y6gsjMvDl4uKFwbuw/8DnVfzdQVI2/IRQPOrhj0Ve73YtAspEa5FmHgcGtm9c 8AL8emOLLs3jVFBVLDcCD3PezeItqaDoj8oAI1RUU3Ks1Pk2OsgKH2PLG/A2q97J MSHv81Sm2m6xbSdAxLsxz+MCWV3Wkhvm0F6Q9k8xUowsIsgql2pbOs4QmAsIwucJ tQdQ0R+yBCV+9lxWODieXTT/N0h7di5GVztip08T5kMxISLUo/Qhswi8jE9GU6ds M6YC/GkSfoV0mOVsbLso8s6IEBlaCJajZduG4RkT1X+gt8nLMtcrx8eR49h0CIMe +cT7Ck174IUL3oOfDJSjWRZkixIqhvmId5gtnjX0sg1mXnvGMMYG2d/0YeF1WZDE of5cDqBMmh9Lm2ZMZvCh =2SYk -----END PGP SIGNATURE----- _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
