Hello. I have a Mellanox ConnectX-3 Pro EN (MCX314A-BCCT). I'm only using a single port so it must provide IP for my host as well as connectivity for VMs. SR-IOV VFs are working great, my KVM VMs have Ethernet and RDMA.
However, I also want to support virtio VMs. Assuming eth0 is the first port on my mlx nic, I've tried placing VMs on a bridge with the primary physical interface, and giving an IP for management to a VF: br0 |--- eth0 |--- VM |--- VM vf0 (IP) vf1 -> VM vf2 -> VM vf3 -> VM I've tried placing VMs on a bridge with one of the VFs and using the primary iface for IP. eth0 (IP) br0 |--- vf0 |--- VM |--- VM vf1 -> VM vf2 -> VM vf3 -> VM And I've also tried using a veth pair to really spread things out: br0 (IP) |--- eth0 |--- veth-a br1 | |--- veth-b |--- VM |--- VM vf1 -> VM vf2 -> VM vf3 -> VM In all cases, VMs with SR-IOV work fine, IP on the host works fine, outbound DHCP from the virtio VMs work fine, but inbound frames are not making it back to the VM. Is there a know limitation of mixing SR-IOV and bridges in general? Does the SR-IOV switch specific to the mlx4 hardware not work well with linux bridges? ...? Thanks! Matt
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