Re: [ovirt-users] Jumbo Frames
Hello Dan:
We are using OVS for SFlow and OSPF functionality. You can see that the bridge was
correctly set:
ovirtmgmt: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 9000
Very odd as OVS is unaware of whether its jumbo frames or not.
Thanks, Phil
----- Original Message -----
From: "Dan Yasny" <dyasny(a)gmail.com>
To: "Phil Daws" <uxbod(a)splatnix.net>
Cc: "users" <users(a)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(a)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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