reproduced on ovn2.12.0-33 with following steps: on client: #!/.bin/bash systemctl start openvswitch systemctl start ovn-northd ovn-nbctl set-connection ptcp:6641 ovn-sbctl set-connection ptcp:6642 ovs-vsctl set open . external_ids:system-id=hv1 external_ids:ovn-remote=tcp:20.0.32.25:6642 external_ids:ovn-encap-type=geneve external_ids:ovn-encap-ip=20.0.32.25 systemctl restart ovn-controller ip netns add server0 ip link add veth0_s0 netns server0 type veth peer name veth0_s0_p ip netns exec server0 ip link set lo up ip netns exec server0 ip link set veth0_s0 up ip netns exec server0 ip link set veth0_s0 address 00:00:00:01:01:02 ip netns exec server0 ip addr add 192.168.1.1/24 dev veth0_s0 ip netns exec server0 ip addr add 2000::1/64 dev veth0_s0 ip netns exec server0 ip route add default via 192.168.1.254 dev veth0_s0 ip netns exec server0 ip -6 route add default via 2000::a dev veth0_s0 ovs-vsctl add-port br-int veth0_s0_p ip link set veth0_s0_p up ovs-vsctl set interface veth0_s0_p external_ids:iface-id=ls1p1 ovn-nbctl ls-add ls1 ovn-nbctl lsp-add ls1 ls1p1 ovn-nbctl lsp-set-addresses ls1p1 "00:00:00:01:01:02 192.168.1.1" ovn-nbctl lsp-add ls1 ls1p2 ovn-nbctl lsp-set-addresses ls1p2 00:00:00:01:02:02 ovn-nbctl lr-add lr1 ovn-nbctl lrp-add lr1 lr1-ls1 00:00:00:00:00:01 192.168.1.254/24 2000::a/64 ovn-nbctl lsp-add ls1 ls1-lr1 ovn-nbctl lsp-set-type ls1-lr1 router ovn-nbctl lsp-set-options ls1-lr1 router-port=lr1-ls1 ovn-nbctl lsp-set-addresses ls1-lr1 00:00:00:00:00:01 ovn-nbctl lsp-add ls1 ls1p3 ovn-nbctl lsp-set-addresses ls1p3 00:00:00:01:03:02 ovn-nbctl lrp-add lr1 lr1-ls0 00:de:ad:ff:01:03 172.16.1.254/24 3000::a/64 ovn-nbctl ls-add ls0 ovn-nbctl lsp-add ls0 ls0-lr1 ovn-nbctl lsp-set-addresses ls0-lr1 router ovn-nbctl lsp-set-type ls0-lr1 router ovn-nbctl lsp-set-options ls0-lr1 router-port=lr1-ls0 ovn-nbctl lsp-add ls0 ln_port ovn-nbctl lsp-set-addresses ln_port unknown ovn-nbctl lsp-set-type ln_port localnet ovn-nbctl lsp-set-options ln_port network_name=nattest ovn-nbctl set Logical_Router_Port lr1-ls0 options:redirect-chassis=hv1 ovs-vsctl add-br br-nat ovs-vsctl set open . external_ids:ovn-bridge-mappings=nattest:br-nat ip link set br-nat up ip netns add p1 ip link add v0_p1_p type veth peer name v0_p1 netns p1 ip netns exec p1 ip link set lo up ip netns exec p1 ip link set v0_p1 up ip netns exec p1 ip addr add 172.16.1.1/24 dev v0_p1 ip netns exec p1 ip addr add 3000::1/64 dev v0_p1 ovs-vsctl add-port br-nat v0_p1_p ip link set v0_p1_p up ovs-vsctl add-port br-nat ens4f1 ovn-nbctl lr-nat-add lr1 dnat_and_snat 172.16.1.100 192.168.1.1 ls1p1 00:00:00:01:01:02 ovn-nbctl lr-nat-add lr1 dnat_and_snat 3000::100 2000::1 ls1p1 00:00:00:01:01:02 on server: systemctl restart openvswitch ovs-vsctl set open . external_ids:system-id=hv0 external_ids:ovn-remote=tcp:20.0.32.25:6642 external_ids:ovn-encap-type=geneve external_ids:ovn-encap-ip=20.0.32.26 systemctl restart ovn-controller ip netns add client0 ip link add veth0_c0 netns client0 type veth peer name veth0_c0_p ip netns exec client0 ip link set lo up ip netns exec client0 ip link set veth0_c0 address 00:00:00:01:02:02 ip netns exec client0 ip link set veth0_c0 up ip netns exec client0 ip addr add 192.168.1.2/24 dev veth0_c0 ip netns exec client0 ip addr add 2000::2/64 dev veth0_c0 ip netns exec client0 ip route add default via 192.168.1.254 dev veth0_c0 ip netns exec client0 ip -6 route add default via 2000::a dev veth0_c0 ovs-vsctl add-port br-int veth0_c0_p ip link set veth0_c0_p up ovs-vsctl set interface veth0_c0_p external_ids:iface-id=ls1p2 ovs-vsctl add-br br-nat ovs-vsctl set open . external_ids:ovn-bridge-mappings=nattest:br-nat ip link set br-nat up ip netns add p2 ip link add v0_p2_p type veth peer name v0_p2 netns p2 ip netns exec p2 ip link set lo up ip netns exec p2 ip link set v0_p2 up ip netns exec p2 ip addr add 172.16.1.2/24 dev v0_p2 ip netns exec p2 ip addr add 3000::2/64 dev v0_p2 ovs-vsctl add-port br-nat v0_p2_p ip link set v0_p2_p up ovs-vsctl add-port br-nat ens4f4d1 [root@dell-per740-12 bz1809629]# rpm -qa | grep -E "openvswitch|ovn" kernel-kernel-networking-openvswitch-ovn-common-1.0-7.noarch openvswitch2.12-2.12.0-23.el8fdp.x86_64 ovn2.12-central-2.12.0-33.el8fdp.x86_64 ovn2.12-host-2.12.0-33.el8fdp.x86_64 kernel-kernel-networking-openvswitch-ovn-acl-1.0-5.noarch ovn2.12-2.12.0-33.el8fdp.x86_64 kernel-kernel-networking-openvswitch-ovn-basic-1.0-20.noarch openvswitch-selinux-extra-policy-1.0-22.el8fdp.noarch [root@hp-dl380pg8-12 bz1809629]# rpm -qa | grep -E "openvswitch|ovn" ovn2.12-host-2.12.0-33.el8fdp.x86_64 kernel-kernel-networking-openvswitch-ovn-common-1.0-7.noarch openvswitch2.12-2.12.0-23.el8fdp.x86_64 ovn2.12-2.12.0-33.el8fdp.x86_64 kernel-kernel-networking-openvswitch-ovn-acl-1.0-5.noarch ovn2.12-central-2.12.0-33.el8fdp.x86_64 kernel-kernel-networking-openvswitch-ovn-basic-1.0-20.noarch openvswitch-selinux-extra-policy-1.0-22.el8fdp.noarch ping floating ip on server: [root@hp-dl380pg8-12 bz1809629]# ip netns exec p2 ping 172.16.1.100 -c 3 PING 172.16.1.100 (172.16.1.100) 56(84) bytes of data. 64 bytes from 172.16.1.100: icmp_seq=2 ttl=63 time=1.71 ms 64 bytes from 172.16.1.100: icmp_seq=3 ttl=63 time=0.306 ms --- 172.16.1.100 ping statistics --- 3 packets transmitted, 2 received, 33.3333% packet loss, time 37ms rtt min/avg/max/mdev = 0.306/1.005/1.705/0.700 ms destroy mac_binding for 172.16.1.2: [root@dell-per740-12 bz1809629]# ovn-sbctl find mac_binding ip=172.16.1.2 _uuid : 4d73b348-eff9-4793-a57c-105d38299483 datapath : 2c77507f-bb5b-4b03-a57a-e472a70b3598 ip : "172.16.1.2" logical_port : lr1-ls0 mac : "ee:af:b4:c5:47:b6" [root@dell-per740-12 bz1809629]# ovn-sbctl destroy mac_binding 4d73b348-eff9-4793-a57c-105d38299483 ping again: [root@hp-dl380pg8-12 bz1809629]# ip netns exec p2 ping 172.16.1.100 -c 3 PING 172.16.1.100 (172.16.1.100) 56(84) bytes of data. 64 bytes from 172.16.1.100: icmp_seq=2 ttl=63 time=1.70 ms 64 bytes from 172.16.1.100: icmp_seq=3 ttl=63 time=0.299 ms --- 172.16.1.100 ping statistics --- 3 packets transmitted, 2 received, 33.3333% packet loss, time 52ms rtt min/avg/max/mdev = 0.299/0.999/1.699/0.700 ms <=== first packet lose Verified on ovn2.12.0-36: [root@hp-dl380pg8-12 bz1809629]# ip netns exec p2 ping 172.16.1.100 -c 3 PING 172.16.1.100 (172.16.1.100) 56(84) bytes of data. 64 bytes from 172.16.1.100: icmp_seq=1 ttl=63 time=6.13 ms 64 bytes from 172.16.1.100: icmp_seq=2 ttl=63 time=1.46 ms 64 bytes from 172.16.1.100: icmp_seq=3 ttl=63 time=0.248 ms --- 172.16.1.100 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 5ms rtt min/avg/max/mdev = 0.248/2.611/6.125/2.533 ms [root@dell-per740-12 bz1809629]# ovn-sbctl find mac_binding ip=172.16.1.2 _uuid : 0fc48193-d425-4cea-aa73-d758003d90b1 datapath : 1f102a52-1a6c-45d0-85f5-ff7baaeb6068 ip : "172.16.1.2" logical_port : lr1-ls0 mac : "0a:43:23:ec:79:f7" [root@dell-per740-12 bz1809629]# ovn-sbctl destroy mac_binding 0fc48193-d425-4cea-aa73-d758003d90b1 [root@hp-dl380pg8-12 bz1809629]# ip netns exec p2 ping 172.16.1.100 -c 3 PING 172.16.1.100 (172.16.1.100) 56(84) bytes of data. 64 bytes from 172.16.1.100: icmp_seq=1 ttl=63 time=4.84 ms 64 bytes from 172.16.1.100: icmp_seq=2 ttl=63 time=1.59 ms 64 bytes from 172.16.1.100: icmp_seq=3 ttl=63 time=0.282 ms --- 172.16.1.100 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 6ms rtt min/avg/max/mdev = 0.282/2.235/4.836/1.914 ms <=== no packet lose [root@hp-dl380pg8-12 bz1809629]# rpm -qa | grep -E "openvswitch|ovn" kernel-kernel-networking-openvswitch-ovn-common-1.0-7.noarch ovn2.12-host-2.12.0-36.el8fdp.x86_64 openvswitch2.12-2.12.0-23.el8fdp.x86_64 ovn2.12-central-2.12.0-36.el8fdp.x86_64 ovn2.12-2.12.0-36.el8fdp.x86_64 kernel-kernel-networking-openvswitch-ovn-acl-1.0-5.noarch kernel-kernel-networking-openvswitch-ovn-basic-1.0-20.noarch openvswitch-selinux-extra-policy-1.0-22.el8fdp.noarch
also verified on rhel7 version: [root@hp-dl380pg8-13 bz1809629]# rpm -qa | grep -E "openvswitch|ovn" openvswitch2.12-2.12.0-23.el7fdp.x86_64 ovn2.12-central-2.12.0-36.el7fdp.x86_64 openvswitch-selinux-extra-policy-1.0-15.el7fdp.noarch ovn2.12-2.12.0-36.el7fdp.x86_64 ovn2.12-host-2.12.0-36.el7fdp.x86_64 [root@hp-dl380pg8-13 bz1809629]# ip netns exec p2 ping 172.16.1.100 -c 3 PING 172.16.1.100 (172.16.1.100) 56(84) bytes of data. 64 bytes from 172.16.1.100: icmp_seq=1 ttl=63 time=7.48 ms 64 bytes from 172.16.1.100: icmp_seq=2 ttl=63 time=1.00 ms 64 bytes from 172.16.1.100: icmp_seq=3 ttl=63 time=0.120 ms --- 172.16.1.100 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2002ms rtt min/avg/max/mdev = 0.120/2.871/7.489/3.285 ms [root@dell-per740-42 bz1809629]# ovn-sbctl find mac_binding ip=172.16.1.2 _uuid : f4556e03-b56c-4c17-ba39-d7a0f4b36256 datapath : cffdfc1c-faf6-4093-ac7c-7c7391455077 ip : "172.16.1.2" logical_port : lr1-ls0 mac : "42:a3:39:f8:eb:b6" [root@dell-per740-42 bz1809629]# ovn-sbctl destroy mac_binding f4556e03-b56c-4c17-ba39-d7a0f4b36256 [root@hp-dl380pg8-13 bz1809629]# ip netns exec p2 ping 172.16.1.100 -c 3 PING 172.16.1.100 (172.16.1.100) 56(84) bytes of data. 64 bytes from 172.16.1.100: icmp_seq=1 ttl=63 time=3.02 ms 64 bytes from 172.16.1.100: icmp_seq=2 ttl=63 time=1.10 ms 64 bytes from 172.16.1.100: icmp_seq=3 ttl=63 time=0.163 ms --- 172.16.1.100 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2002ms rtt min/avg/max/mdev = 0.163/1.430/3.025/1.191 ms <=== no packet loss
ovn2.12 has been superceded by ovn2.13.