Try changing that custom MTU and hitting OK. I get: on 3.5 and 3.5.1. What version are you running? > On Jan 27, 2015, at 2:04 PM, Donny Davis <donny(a)cloudspin.me&gt; wrote: > > Maybe I missed your question, but I can change the MTU from the gui without any problems. As long as you make sure there are not any vm's on the host you are trying to sync, I have experienced no issues.  > > Donny > > -----Original Message----- > From: Darrell Budic [mailto:budic@onholyground.com]  > Sent: Tuesday, January 27, 2015 12:30 PM > To: Donny Davis > Cc: users(a)ovirt.org > Subject: Re: [ovirt-users] change network MTU settings without taking all the VMs down? > > Except you can’t change the network MTU setting in the first place on the network in the GUI. I’ve thought about doing it in the database, with a migration as you mention. Just checking first for better options :) > > >> On Jan 27, 2015, at 12:08 PM, Donny Davis <donny(a)cloudspin.me&gt; wrote: >> >> Migrate the vms between hosts, and when a host gets to no running VMS you can sync that network.  >> >> Donny D >> cloudspin.meOn Jan 27, 2015 10:43 AM, Darrell Budic <budic(a)onholyground.com&gt; wrote: >>> >>> >>> I finally got a couple of networks our from behind a wan based layer 2 bridge that required me to run at MTU 1448, and would like to get back up to MTU 1500. I see the GUI won’t let me do that while the network is in use. Any way around this, clean or otherwise? Restarting VMs to update them is ok, just trying to avoid having to take everything down at the same time. >>> >>> -Darrell >>> _______________________________________________ >>> Users mailing list >>> Users(a)ovirt.org >>> http://lists.ovirt.org/mailman/listinfo/users > > > <Capture.PNG>