Hello! I am currently testing this patchset (http://dpdk.org/ml/archives/dev/2015-December/029193.html), and I've got a question. After the migration the guest has to announce its MAC address for the network to work. Guest OS can do it itself, or qemu can send VHOST_USER_SEND_RARP to the vhost device. The problem arises because: 1. DPDK currently does not implement VHOST_USER_SEND_RARP 2. DPDK does not announce VIRTIO_NET_F_GUEST_ANNOUNCE feature, therefore qemu does not propagate it to the guest, and the quest does not activate own announcing.
The question is: why do we expect vhost-user to return VIRTIO_NET_F_GUEST_ANNOUNCE ? Does the device really need to have some explicit support for it? As far as I can understand, there's no special handling to be done, the guest just sends GARP and that's it. So why doesn't qemu turn on this feature by itself? Kind regards, Pavel Fedin Expert Engineer Samsung Electronics Research center Russia
