I repeated the tests with LANIC HW features Large ReceiveO ffload and TCP Segmentation Offload turned OFF.
Now the IPv4 packets are stable with MTU=1500 and TCP MSS=1460 in a broadcast domain. the IPv4 packets up to 64KiB are caused by the HW features of LANIC and not by pathMTU algorithm. you can close this request. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1953030 Title: pathMTU tuning needs parameter tcp_mtu_probe_ceiling To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kernel-package/+bug/1953030/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
