> On 20 May, 2016, at 20:01, Rick Jones <rick.jones2 at hpe.com> wrote: > > But I haven't seen that EMSGSIZE happen with netperf UDP tests - could be though I've never run them in an environment which triggered PTMUD. It’s entirely possible that netperf and/or iperf3 are (ab)using the IP_MTU_DISCOVERY socket option mentioned. - Jonathan Morton