Actually, on xenU, issuing the commands ethtool -K eth0 tx off ethtool -K eth0 tx on
fixes the problem too, so changing the tx offloading back to on doesn't break it again. And the real problem here is that xenU keeps sending big packets even though it gets the fragmentation needed info. I don't have a tcpdump to copy-paste at hand right now, but for me it looked like this: xenU > target: length 2948 firewall > xenU: ICMP fragmentatinon needed xenU > destination: length 1480 target > xenU: ACK xenU > target: length 2948 firewall > xenU: ICMP fragmentatinon needed So xenU is sending too big packets over and over again, and firewall has to ask it to fragment them each time. And this hurts performance REALLY hard. -- xenU sending too big packets https://bugs.launchpad.net/bugs/154271 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
