[ovs-discuss] Modifying the fdb database ?

Jesse Gross jesse at nicira.com
Fri Aug 9 21:36:37 UTC 2013


On Fri, Aug 9, 2013 at 2:32 PM, Kristoffer Egefelt <kristoffer at itoc.dk> wrote:
> Hi,
>
> Network between VMs connected to openvswitch and VMs connected with SR-IOV
> interfaces (VFs) on the same host seems not to work, due to some special arp
> handling in the ixgbevf driver where arp traffic is not forwarded to the
> physical interface.
> If the NIC does not know about the ovs connected VMs MAC address, which it
> apparently can't because the VM is hiding behind a (openvswitch) bridge, the
> arp traffic seems to be black holed.
>
> I found this https://communities.intel.com/thread/43504 which suggests that
> the problem can be solved by manually adding the VMs mac address to the PF
> in the forwarding database.
>
> I can't find any way to try this with openvswitch - somebody know about a
> solution to this or have any ideas?

Open vSwitch does not manage the FDB in SR-IOV NICs, so you'll have to
find a way to do it using the driver's tools.
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