I am able to reproduce the issue, and unfortunately there appears to be nothing exciting about it, it is just an load induced intermittent failure. Any apparent architecture specific nature is just random.
This patch appears to fix the issue: diff --git a/tests/system-traffic.at b/tests/system-traffic.at index 202ff0492..3c4fa68eb 100644 --- a/tests/system-traffic.at +++ b/tests/system-traffic.at @@ -253,6 +253,8 @@ priority=0,actions=NORMAL AT_CHECK([ovs-ofctl del-flows br0]) AT_CHECK([ovs-ofctl add-flows br0 flows.txt]) +OVS_WAIT_UNTIL([ip netns exec at_ns1 ping6 -c 1 fc00::3]) + NS_CHECK_EXEC([at_ns0], [ping6 -q -c 3 -i 0.3 -W 2 fc00::3 | FORMAT_PING], [0], [dnl 3 packets transmitted, 3 received, 0% packet loss, time 0ms ]) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2077157 Title: [oracular][s390x] ping6 between two ports with header modify fails for all datapaths To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openvswitch/+bug/2077157/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs