On Sat, Jan 23, 2016 at 12:19:29PM +0100, Reyk Floeter wrote: > No, you have to *enable* SR-IOV in the image. > > Machines with the Intel NIC will not show any netfront in the device list via > XenStore (just try Ubuntu). > > Reyk
That's correct, but I think what was being pointed out is that an instance with SRIOV enabled cannot have it *disabled* (i.e. to switch back to xnf NICs). I was able to get xnf operational on a c3.large (enhanced networking-capable) by creating an instance with CentOS and swapping the root volume out. Any AMI constructed on Amazon Linux or Ubuntu will have enhanced networking enabled by default, whereas CentOS doesn't appear to have it enabled (unless you manually enable it).
