On Mon, Dec 8, 2014 at 7:33 AM, Jesse Gross <je...@nicira.com> wrote:
> If you look at the implementation of GRO/TSO, I think you will see > that it does in fact faithfully reconstruct the original message and > path MTU discovery is preserved. On Linux systems, GRO is enabled by > default for all workloads - including those that do not result in > local termination such as bridging. I will go back and test this again (it's been a while - we just run with all offloads turned off by default now). When we were having problems with this we would find segmented TCP flows getting reassembled along the path and then output with the local egress MTU (which was considerably larger than that at the end stations), resulting in performance-crushing IP fragmentation later in the path. -- Nick
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