The drop is caused by flow change.
When packet is dropped. ======== recirc_id(0),tunnel(tun_id=0x19aca,src=10.6.30.92,dst=10.6.30.22,geneve({class=0x102,type=0x80,len=4,0x20003/0x7fffffff}),flags(-df+csum+key)),in_port(3),eth(src=fa:16:3e:df:1e:85,dst=00:00:00:00:00:00/01:00:00:00:00:00),eth_type(0x0800),ipv4(proto=1,frag=no),icmp(type=8/0xf8), packets:14, bytes:1372, used:0.846s, actions:drop recirc_id(0),in_port(12),eth(src=fa:16:3e:7d:bb:85,dst=fa:16:3e:df:1e:85),eth_type(0x0800),ipv4(src=192.168.236.152/255.255.255.252,dst=10.6.40.9,proto=1,tos=0/0x3,ttl=64,frag=no),icmp(type=0), packets:6, bytes:588, used:8.983s, actions:drop ======== When packet goes through. ======== recirc_id(0),tunnel(tun_id=0x19aca,src=10.6.30.92,dst=10.6.30.22,geneve({class=0x102,type=0x80,len=4,0x20003/0x7fffffff}),flags(-df+csum+key)),in_port(3),eth(src=fa:16:3e:df:1e:85,dst=00:00:00:00:00:00/01:00:00:00:00:00),eth_type(0x0800),ipv4(proto=1,frag=no),icmp(type=8/0xf8), packets:3, bytes:294, used:0.104s, actions:12 recirc_id(0),in_port(12),eth(src=fa:16:3e:7d:bb:85,dst=fa:16:3e:df:1e:85),eth_type(0x0800),ipv4(src=192.168.236.152/255.255.255.252,dst=10.6.40.9,proto=1,tos=0/0x3,ttl=64,frag=no),icmp(type=0), packets:3, bytes:294, used:0.103s, actions:ct_clear,set(tunnel(tun_id=0x1a8ee,dst=10.6.30.92,ttl=64,tp_dst=6081,geneve({class=0x102,type=0x80,len=4,0x1000b}),flags(df|csum|key))),set(eth(src=fa:16:3e:75:b7:e5,dst=52:54:00:0c:ef:b9)),set(ipv4(ttl=63)),3 ======== Is that flow programmed by ovn-controller via ovs-vswitchd? Thanks! Tony > -----Original Message----- > From: discuss <ovs-discuss-boun...@openvswitch.org> On Behalf Of Tony > Liu > Sent: Wednesday, August 5, 2020 2:48 PM > To: ovs-disc...@openvswitch.org; ovs-dev@openvswitch.org > Subject: [ovs-discuss] packet drop > > Hi, > > I am running ping from external to VM via OVN gateway. > On the compute node, ICMP request packet is consistently coming into > interface "ovn-gatewa-1". But there is about 10 out of 25 packet loss on > tap interface. It's like the switch pauses 10s after every 15s. > > Has anyone experiences such issue? > Any advice how to look into it? > > ======== > 21fed09f-909e-4efc-b117-f5d5fcb636c9 > Bridge br-int > fail_mode: secure > datapath_type: system > Port "ovn-gatewa-0" > Interface "ovn-gatewa-0" > type: geneve > options: {csum="true", key=flow, remote_ip="10.6.30.91"} > bfd_status: {diagnostic="No Diagnostic", flap_count="1", > forwarding="true", remote_diagnostic="No Diagnostic", remote_state=up, > state=up} > Port "tap2588bb4e-35" > Interface "tap2588bb4e-35" > Port "ovn-gatewa-1" > Interface "ovn-gatewa-1" > type: geneve > options: {csum="true", key=flow, remote_ip="10.6.30.92"} > bfd_status: {diagnostic="No Diagnostic", flap_count="1", > forwarding="true", remote_diagnostic="No Diagnostic", remote_state=up, > state=up} > Port "tap37f6b2d7-cc" > Interface "tap37f6b2d7-cc" > Port "tap2c4b3b0f-8b" > Interface "tap2c4b3b0f-8b" > Port "tap23245491-a4" > Interface "tap23245491-a4" > Port "tap51660269-2c" > Interface "tap51660269-2c" > Port "tap276cd1ef-e1" > Interface "tap276cd1ef-e1" > Port "tap138526d3-b3" > Interface "tap138526d3-b3" > Port "tapd1ae48a1-2d" > Interface "tapd1ae48a1-2d" > Port br-int > Interface br-int > type: internal > Port "tapdd08f476-94" > Interface "tapdd08f476-94" > ======== > > > Thanks! > > Tony > > _______________________________________________ > discuss mailing list > disc...@openvswitch.org > https://mail.openvswitch.org/mailman/listinfo/ovs-discuss _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev