Upon further consideration, I&#x27;ve deleted the bulk of this comment.<p>Rough summary of what I had here: I&#x27;m an engineer on GCE (in particular I built our current virtio-net device and a small fraction of the other fiddly bits that sit behind that) -- some details in the bug jumped out at me and I thought there might be a quick fix, but I hadn&#x27;t processed all of the details and posted a bit prematurely. After further review my original post was essentially content free other than &#x27;IP fragmentation works correctly between internal IPs&#x27;, which is not germane to the actual customer-reported issue.