Don't forget to run a ping with a size of 8500 and "do not fragment" flag. This will really prove that you are no longer using the small MTU anywhere on the path. Best Regards, Strahil NikolovOn Jul 9, 2019 17:27, Mark Steele <msteele@telvue.com> wrote:

Thank you Strahil,

The MTU appears to be set to 1500 according to 'ifconfig'.

Mark

*** Mark Steele CIO / VP Technical Operations | TelVue Corporation TelVue - We Share Your Vision 16000 Horizon Way, Suite 100 | Mt. Laurel, NJ 08054 800.885.8886 x128 | msteele@telvue.com | http://www.telvue.com twitter: http://twitter.com/telvue | facebook: https://www.facebook.com/telvue

On Tue, Jul 9, 2019 at 10:14 AM Strahil Nikolov <hunter86_bg@yahoo.com> wrote:

...

The first thing that comes to my mind is to check the network's MTU. By default it is 1500, and I suppose you can go with MTU 9000 Also , check if OS is using MTU 9000

Best Regards, Strahil Nikolov

В вторник, 9 юли 2019 г., 9:58:47 ч. Гринуич-4, Mark Steele <msteele@telvue.com> написа:

It seems that our oVirt instance never exceeds 550Mbps aggregate traffic (rx / tx) according to nvstat. I want to make sure that the negotiated speed, handshaking, etc. are all what I expect them to be from the OS level.

*** Mark Steele