[ovirt-users] Jumbo Frames

[Dan Yasny]

Why do you use OVS at all? If you have VLANs, all you need is to tag the
mgmt traffic, and create a VM traffic VLAN with a different MTU. The bridge
and underlying NICs will have MTU=9000 and the VM bridge will have MTU=1500

On Thu, Nov 20, 2014 at 7:40 PM, Phil Daws <uxbod at splatnix.net> wrote:

> Hello:
>
> am really enjoying oVirt but have now hit an issue with iSCSI.  As there
> is only one NIC in the host I have had to enable an MTU of 9000 on
> ovirtmgmt.  Then have vNIC profiles on that interface which are using a
> custom hook for Openvswitch.  I have created a specific vLAN for iSCSI
> traffic and on the initiator and targets have set their respective
> interface MTUs to be 9000.  When I connect to a LUN it is timing out
> straight away with a 1011 error.  If I drop the MTU back to 1500 all works
> okay.  This is all fine on my other KVM, non-oVirt, system so am wondering
> if I have missed a step ?
>
> Thanks, Phil
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