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[Yang JianFeng <1773286@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

As shown below,the network that's internal vlan is 4 only has 'qr-' port
in compute2

[root@compute2 ~]# ovs-vsctl show|grep "tag: 4" -C 2
                type: internal
        Port "qr-1862e19a-91"
            tag: 4
            Interface "qr-1862e19a-91"
                type: internal
[root@compute2 ~]# 


I checked the network's flow tables on br-tun,they are right.

[root@compute2 ~]# ovs-ofctl dump-flows br-tun|grep "dl_vlan=4"
 cookie=0x56ca5c04010b5cea, duration=65.109s, table=1, n_packets=0, n_bytes=0, idle_age=69, priority=3,arp,dl_vlan=4,arp_tpa=10.10.122.1 actions=drop
 cookie=0x56ca5c04010b5cea, duration=65.107s, table=1, n_packets=0, n_bytes=0, idle_age=69, priority=2,dl_vlan=4,dl_dst=fa:16:3e:67:d7:df actions=drop
 cookie=0x56ca5c04010b5cea, duration=65.106s, table=1, n_packets=0, n_bytes=0, idle_age=69, priority=1,dl_vlan=4,dl_src=fa:16:3e:67:d7:df actions=mod_dl_src:fa:16:3f:aa:34:f9,resubmit(,2)
 cookie=0x56ca5c04010b5cea, duration=65.544s, table=20, n_packets=0, n_bytes=0, idle_age=68, priority=2,dl_vlan=4,dl_dst=fa:16:3e:10:26:dc actions=strip_vlan,load:0x56->NXM_NX_TUN_ID[],output:2
 cookie=0x56ca5c04010b5cea, duration=64.158s, table=20, n_packets=0, n_bytes=0, idle_age=67, priority=2,dl_vlan=4,dl_dst=fa:16:3e:f5:91:5e actions=strip_vlan,load:0x56->NXM_NX_TUN_ID[],output:3
 cookie=0x56ca5c04010b5cea, duration=65.546s, table=21, n_packets=0, n_bytes=0, idle_age=68, priority=1,arp,dl_vlan=4,arp_tpa=10.10.122.8 actions=load:0x2->NXM_OF_ARP_OP[],move:NXM_NX_ARP_SHA[]->NXM_NX_ARP_THA[],move:NXM_OF_ARP_SPA[]->NXM_OF_ARP_TPA[],load:0xfa163e1026dc->NXM_NX_ARP_SHA[],load:0xa0a7a08->NXM_OF_ARP_SPA[],move:NXM_OF_ETH_SRC[]->NXM_OF_ETH_DST[],mod_dl_src:fa:16:3e:10:26:dc,IN_PORT
 cookie=0x56ca5c04010b5cea, duration=64.161s, table=21, n_packets=0, n_bytes=0, idle_age=67, priority=1,arp,dl_vlan=4,arp_tpa=10.10.122.2 actions=load:0x2->NXM_OF_ARP_OP[],move:NXM_NX_ARP_SHA[]->NXM_NX_ARP_THA[],move:NXM_OF_ARP_SPA[]->NXM_OF_ARP_TPA[],load:0xfa163ef5915e->NXM_NX_ARP_SHA[],load:0xa0a7a02->NXM_OF_ARP_SPA[],move:NXM_OF_ETH_SRC[]->NXM_OF_ETH_DST[],mod_dl_src:fa:16:3e:f5:91:5e,IN_PORT
 cookie=0x56ca5c04010b5cea, duration=64.164s, table=22, n_packets=0, n_bytes=0, idle_age=69, priority=1,dl_vlan=4 actions=strip_vlan,load:0x56->NXM_NX_TUN_ID[],output:2,output:3
[root@compute2 ~]# 


But,after I restart neutron-openvswitch-agent,I found these flows in table 20,21,22 is lost.

systemctl restart neutron-openvswitch-agent

[root@compute2 ~]# ovs-ofctl dump-flows br-tun|grep "dl_vlan=4"
 cookie=0x6c26ffbe1a6134eb, duration=11.442s, table=1, n_packets=0, n_bytes=0, idle_age=13, priority=3,arp,dl_vlan=4,arp_tpa=10.10.122.1 actions=drop
 cookie=0x6c26ffbe1a6134eb, duration=11.441s, table=1, n_packets=0, n_bytes=0, idle_age=13, priority=2,dl_vlan=4,dl_dst=fa:16:3e:67:d7:df actions=drop
 cookie=0x6c26ffbe1a6134eb, duration=11.440s, table=1, n_packets=0, n_bytes=0, idle_age=13, priority=1,dl_vlan=4,dl_src=fa:16:3e:67:d7:df actions=mod_dl_src:fa:16:3f:aa:34:f9,resubmit(,2)
[root@compute2 ~]#

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1773286

Title:
  In some specific case with dvr mode I found the l2pop flows is
  incomplete.

Status in neutron:
  New

Bug description:
  As shown below,the network that's internal vlan is 4 only has 'qr-'
  port in compute2

  [root@compute2 ~]# ovs-vsctl show|grep "tag: 4" -C 2
                  type: internal
          Port "qr-1862e19a-91"
              tag: 4
              Interface "qr-1862e19a-91"
                  type: internal
  [root@compute2 ~]# 

  
  I checked the network's flow tables on br-tun,they are right.

  [root@compute2 ~]# ovs-ofctl dump-flows br-tun|grep "dl_vlan=4"
   cookie=0x56ca5c04010b5cea, duration=65.109s, table=1, n_packets=0, n_bytes=0, idle_age=69, priority=3,arp,dl_vlan=4,arp_tpa=10.10.122.1 actions=drop
   cookie=0x56ca5c04010b5cea, duration=65.107s, table=1, n_packets=0, n_bytes=0, idle_age=69, priority=2,dl_vlan=4,dl_dst=fa:16:3e:67:d7:df actions=drop
   cookie=0x56ca5c04010b5cea, duration=65.106s, table=1, n_packets=0, n_bytes=0, idle_age=69, priority=1,dl_vlan=4,dl_src=fa:16:3e:67:d7:df actions=mod_dl_src:fa:16:3f:aa:34:f9,resubmit(,2)
   cookie=0x56ca5c04010b5cea, duration=65.544s, table=20, n_packets=0, n_bytes=0, idle_age=68, priority=2,dl_vlan=4,dl_dst=fa:16:3e:10:26:dc actions=strip_vlan,load:0x56->NXM_NX_TUN_ID[],output:2
   cookie=0x56ca5c04010b5cea, duration=64.158s, table=20, n_packets=0, n_bytes=0, idle_age=67, priority=2,dl_vlan=4,dl_dst=fa:16:3e:f5:91:5e actions=strip_vlan,load:0x56->NXM_NX_TUN_ID[],output:3
   cookie=0x56ca5c04010b5cea, duration=65.546s, table=21, n_packets=0, n_bytes=0, idle_age=68, priority=1,arp,dl_vlan=4,arp_tpa=10.10.122.8 actions=load:0x2->NXM_OF_ARP_OP[],move:NXM_NX_ARP_SHA[]->NXM_NX_ARP_THA[],move:NXM_OF_ARP_SPA[]->NXM_OF_ARP_TPA[],load:0xfa163e1026dc->NXM_NX_ARP_SHA[],load:0xa0a7a08->NXM_OF_ARP_SPA[],move:NXM_OF_ETH_SRC[]->NXM_OF_ETH_DST[],mod_dl_src:fa:16:3e:10:26:dc,IN_PORT
   cookie=0x56ca5c04010b5cea, duration=64.161s, table=21, n_packets=0, n_bytes=0, idle_age=67, priority=1,arp,dl_vlan=4,arp_tpa=10.10.122.2 actions=load:0x2->NXM_OF_ARP_OP[],move:NXM_NX_ARP_SHA[]->NXM_NX_ARP_THA[],move:NXM_OF_ARP_SPA[]->NXM_OF_ARP_TPA[],load:0xfa163ef5915e->NXM_NX_ARP_SHA[],load:0xa0a7a02->NXM_OF_ARP_SPA[],move:NXM_OF_ETH_SRC[]->NXM_OF_ETH_DST[],mod_dl_src:fa:16:3e:f5:91:5e,IN_PORT
   cookie=0x56ca5c04010b5cea, duration=64.164s, table=22, n_packets=0, n_bytes=0, idle_age=69, priority=1,dl_vlan=4 actions=strip_vlan,load:0x56->NXM_NX_TUN_ID[],output:2,output:3
  [root@compute2 ~]# 

  
  But,after I restart neutron-openvswitch-agent,I found these flows in table 20,21,22 is lost.

  systemctl restart neutron-openvswitch-agent

  [root@compute2 ~]# ovs-ofctl dump-flows br-tun|grep "dl_vlan=4"
   cookie=0x6c26ffbe1a6134eb, duration=11.442s, table=1, n_packets=0, n_bytes=0, idle_age=13, priority=3,arp,dl_vlan=4,arp_tpa=10.10.122.1 actions=drop
   cookie=0x6c26ffbe1a6134eb, duration=11.441s, table=1, n_packets=0, n_bytes=0, idle_age=13, priority=2,dl_vlan=4,dl_dst=fa:16:3e:67:d7:df actions=drop
   cookie=0x6c26ffbe1a6134eb, duration=11.440s, table=1, n_packets=0, n_bytes=0, idle_age=13, priority=1,dl_vlan=4,dl_src=fa:16:3e:67:d7:df actions=mod_dl_src:fa:16:3f:aa:34:f9,resubmit(,2)
  [root@compute2 ~]#

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