[Xen-users] Xen/OVS - VLAN offloading

[Eugene Istomin <e.istomin@xxxxxxx>]

Hello,

 

i'm trying to understand Xen/OVS - VLAN offloading

 

 

In my testbed:

 

#ovs-vsctl show

Bridge vlannet

Port "vif5.0"

tag: 1002

Interface "vif5.0"

Port vlannet-bond

Interface "vlannet2"

Interface "vlannet1"

Port vlannet

Interface vlannet

type: internal

Port "vif3.0"

tag: 1002

Interface "vif3.0"

ovs_version: "1.10.0"

 

1) Xen Dom0 HW interface ->

ethtool -k vlannet1

 

..

rx-vlan-offload: on

tx-vlan-offload: on

rx-vlan-filter: on [fixed]

..

 

2) OVS system interface ->

ethtool -k ovs-system

 

..

rx-vlan-offload: off [fixed]

tx-vlan-offload: on

rx-vlan-filter: off [fixed]

..

 

3) DomU netback interface ->

ethtool -k ovs-system

 

..

rx-vlan-offload: off [fixed]

tx-vlan-offload: off [fixed]

rx-vlan-filter: off [fixed]

 

..

 

 

As i see, VLAN offloading is partially implemented in OVS and didn't implemented in Xen means VLAN tagged traffic inside VM will make additional latency.

 

Can anyone have info about OVS->VM VLAN offloading configuration?

 

Thanks.

--

Best regards,

Eugene Istomin

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