[ovirt-users] Jumbo Frames

[Phil Daws]

Dan: 

How would you suggestion work as you can only assign one network to an interface? as mentioned we only have one NIC in the server so hence using OVS to VLAN. 

Thanks, Phil 

----- Original Message ----- 
From: "Dan Yasny" <dyasny at gmail.com> 
To: "Phil Daws" <uxbod at splatnix.net> 
Cc: "users" <users at ovirt.org> 
Sent: Friday, 21 November, 2014 1:39:32 AM 
Subject: Re: [ovirt-users] Jumbo Frames 

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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