[ovirt-users] Fwd: oVirt / OVN / MTU

Marcin / Lance, Not sure if the list was working correctly, I couldn't see that my message below made it to the list. If I need to change the MTU settings for OVN / OpenVSwitch to something lower than 1500, what is the best way to do this? We noticed that some instances (ie: Windows 2012R2) are having issues with the default MTU of 1500, I think there is an issue at the upper layers, and we can get it to work if we manually set the MTU on the instance to say 1400. Is there an easy way to do this so that any VM's that come up automatically get MTU of 1400? Devin ---------- Forwarded message ---------- From: Devin Acosta <devin(a)pabstatencio.com&gt; Date: Fri, Dec 9, 2016 at 2:02 PM Subject: oVirt / OVN / MTU To: users <Users(a)ovirt.org&gt; We are running oVirt 4.0.5 and we have OVN working to provide a Virtual Layer 2 network. We are noticing that because the OVN is using Geneve and between all the firewalls and networks it crosses we are running into an MTU issue. What is the best suggested way to lower say the entire OVN network to say MTU of 1400, and also allow for fragmenting packets? -- Devin Acosta Red Hat Certified Architect, LinuxStack 602-354-1220 || devin(a)linuxguru.co -- Devin Acosta Red Hat Certified Architect, LinuxStack 602-354-1220 || devin(a)linuxguru.co