I am analysing arp responder service in L2 scenario.

I did a simple deletion test. For that am using 1 control node and 2 compute nodes (Compute1 and Compute2).

I Created 4 Networks (tenant1, tenant2, tenant3 and tenant4) and then created 4 Vm instances in control and 4 vms in compute1

while create scenario, the arp flows are installed as expected, but in the delete scenario arp flows are not deleted for dhcp port for compute1.

I deleted all the VMs from control and compute1 but still the arp flows for dhcp port are not deleted from compute1.

If we deleted any one of the network, then all arp flows are deleted from compute1.

Is this expected behaviour ?

Please find below dump flows for compute1 node

Compute1:

Created 4 Vm instances:

cookie=0x0, duration=17.736s, table=20, n_packets=0, n_bytes=0, priority=1024,arp,tun_id=0x442,arp_tpa=40.0.0.1,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:ff:b8:b4>eth_src,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:0xfa163effb8b4->NXM_NX_ARP_SHA[],load:0x28000001->NXM_OF_ARP_SPA[],IN_PORT
cookie=0x0, duration=96.335s, table=20, n_packets=0, n_bytes=0, priority=1024,arp,tun_id=0x40e,arp_tpa=30.0.0.2,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:5a:b7:f4>eth_src,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:0xfa163e5ab7f4->NXM_NX_ARP_SHA[],load:0x1e000002->NXM_OF_ARP_SPA[],IN_PORT
cookie=0x0, duration=171.663s, table=20, n_packets=1, n_bytes=42, priority=1024,arp,tun_id=0x41f,arp_tpa=10.0.0.1,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:e8:97:07>eth_src,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:0xfa163ee89707->NXM_NX_ARP_SHA[],load:0xa000001->NXM_OF_ARP_SPA[],IN_PORT
cookie=0x0, duration=138.739s, table=20, n_packets=0, n_bytes=0, priority=1024,arp,tun_id=0x3f8,arp_tpa=20.0.0.3,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:9a:98:9c>eth_src,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:0xfa163e9a989c->NXM_NX_ARP_SHA[],load:0x14000003->NXM_OF_ARP_SPA[],IN_PORT
cookie=0x0, duration=18.132s, table=20, n_packets=0, n_bytes=0, priority=1024,arp,tun_id=0x442,arp_tpa=40.0.0.3,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:93:26:f5>eth_src,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:0xfa163e9326f5->NXM_NX_ARP_SHA[],load:0x28000003->NXM_OF_ARP_SPA[],IN_PORT
cookie=0x0, duration=17.695s, table=20, n_packets=0, n_bytes=0, priority=1024,arp,tun_id=0x442,arp_tpa=40.0.0.2,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:3c:dc:a4>eth_src,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:0xfa163e3cdca4->NXM_NX_ARP_SHA[],load:0x28000002->NXM_OF_ARP_SPA[],IN_PORT
cookie=0x0, duration=96.439s, table=20, n_packets=0, n_bytes=0, priority=1024,arp,tun_id=0x40e,arp_tpa=30.0.0.3,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:20:3a:9a>eth_src,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:0xfa163e203a9a->NXM_NX_ARP_SHA[],load:0x1e000003->NXM_OF_ARP_SPA[],IN_PORT
cookie=0x0, duration=138.671s, table=20, n_packets=1, n_bytes=42, priority=1024,arp,tun_id=0x3f8,arp_tpa=20.0.0.1,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:f8:49:9a>eth_src,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:0xfa163ef8499a->NXM_NX_ARP_SHA[],load:0x14000001->NXM_OF_ARP_SPA[],IN_PORT
cookie=0x0, duration=171.417s, table=20, n_packets=0, n_bytes=0, priority=1024,arp,tun_id=0x41f,arp_tpa=10.0.0.2,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:9d:7a:12>eth_src,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:0xfa163e9d7a12->NXM_NX_ARP_SHA[],load:0xa000002->NXM_OF_ARP_SPA[],IN_PORT
cookie=0x0, duration=96.772s, table=20, n_packets=1, n_bytes=42, priority=1024,arp,tun_id=0x40e,arp_tpa=30.0.0.1,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:6d:c2:e7>eth_src,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:0xfa163e6dc2e7->NXM_NX_ARP_SHA[],load:0x1e000001->NXM_OF_ARP_SPA[],IN_PORT
cookie=0x0, duration=171.974s, table=20, n_packets=0, n_bytes=0, priority=1024,arp,tun_id=0x41f,arp_tpa=10.0.0.3,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:d2:be:f1>eth_src,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:0xfa163ed2bef1->NXM_NX_ARP_SHA[],load:0xa000003->NXM_OF_ARP_SPA[],IN_PORT
cookie=0x0, duration=139.036s, table=20, n_packets=0, n_bytes=0, priority=1024,arp,tun_id=0x3f8,arp_tpa=20.0.0.2,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:9e:5b:1b>eth_src,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:0xfa163e9e5b1b->NXM_NX_ARP_SHA[],load:0x14000002->NXM_OF_ARP_SPA[],IN_PORT

Deleted all Vm's:

cookie=0x0, duration=93.716s, table=20, n_packets=1, n_bytes=42, priority=1024,arp,tun_id=0x442,arp_tpa=40.0.0.1,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:ff:b8:b4>eth_src,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:0xfa163effb8b4->NXM_NX_ARP_SHA[],load:0x28000001->NXM_OF_ARP_SPA[],IN_PORT
cookie=0x0, duration=247.643s, table=20, n_packets=1, n_bytes=42, priority=1024,arp,tun_id=0x41f,arp_tpa=10.0.0.1,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:e8:97:07>eth_src,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:0xfa163ee89707->NXM_NX_ARP_SHA[],load:0xa000001->NXM_OF_ARP_SPA[],IN_PORT
cookie=0x0, duration=214.651s, table=20, n_packets=1, n_bytes=42, priority=1024,arp,tun_id=0x3f8,arp_tpa=20.0.0.1,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:f8:49:9a>eth_src,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:0xfa163ef8499a->NXM_NX_ARP_SHA[],load:0x14000001->NXM_OF_ARP_SPA[],IN_PORT
cookie=0x0, duration=172.752s, table=20, n_packets=1, n_bytes=42, priority=1024,arp,tun_id=0x40e,arp_tpa=30.0.0.1,arp_op=1 actions=move:NXM_OF_ETH_SRC[]>NXM_OF_ETH_DST[],set_field:fa:16:3e:6d:c2:e7>eth_src,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:0xfa163e6dc2e7->NXM_NX_ARP_SHA[],load:0x1e000001->NXM_OF_ARP_SPA[],IN_PORT

Deleted Network (tenant2):

[stack@compute1 devstack]$ sudo ovs-ofctl -O OpenFlow13 dump-flows br-int
OFPST_FLOW reply (OF1.3) (xid=0x2):
cookie=0x0, duration=2473.923s, table=0, n_packets=0, n_bytes=0, dl_type=0x88cc actions=CONTROLLER:65535
cookie=0x0, duration=2473.923s, table=0, n_packets=115, n_bytes=29318, priority=0 actions=goto_table:20
cookie=0x0, duration=2473.940s, table=20, n_packets=275, n_bytes=49234, priority=0 actions=goto_table:30
cookie=0x0, duration=2473.897s, table=30, n_packets=275, n_bytes=49234, priority=0 actions=goto_table:40
cookie=0x0, duration=1709.091s, table=40, n_packets=6, n_bytes=468, priority=61007,ipv6,dl_src=fa:16:3e:d2:be:f1 actions=goto_table:50
cookie=0x0, duration=1676.653s, table=40, n_packets=6, n_bytes=468, priority=61007,ipv6,dl_src=fa:16:3e:9a:98:9c actions=goto_table:50
cookie=0x0, duration=1632.241s, table=40, n_packets=13, n_bytes=1670, priority=61007,ip,dl_src=fa:16:3e:20:3a:9a actions=goto_table:50
cookie=0x0, duration=1556.208s, table=40, n_packets=13, n_bytes=1670, priority=61007,ip,dl_src=fa:16:3e:93:26:f5 actions=goto_table:50
cookie=0x0, duration=2473.940s, table=40, n_packets=237, n_bytes=44958, priority=0 actions=goto_table:50
cookie=0x0, duration=2473.923s, table=50, n_packets=275, n_bytes=49234, priority=0 actions=goto_table:60
cookie=0x0, duration=2473.923s, table=60, n_packets=275, n_bytes=49234, priority=0 actions=goto_table:70
cookie=0x0, duration=2473.953s, table=70, n_packets=275, n_bytes=49234, priority=0 actions=goto_table:80
cookie=0x0, duration=2473.923s, table=80, n_packets=275, n_bytes=49234, priority=0 actions=goto_table:90
cookie=0x0, duration=1557.278s, table=90, n_packets=13, n_bytes=1703, priority=61007,ip,dl_dst=fa:16:3e:93:26:f5 actions=goto_table:100
cookie=0x0, duration=1638.385s, table=90, n_packets=13, n_bytes=1703, priority=61007,ip,dl_dst=fa:16:3e:9a:98:9c actions=goto_table:100
cookie=0x0, duration=1632.858s, table=90, n_packets=13, n_bytes=1703, priority=61007,ip,dl_dst=fa:16:3e:20:3a:9a actions=goto_table:100
cookie=0x0, duration=1680.468s, table=90, n_packets=13, n_bytes=1703, priority=61007,ip,dl_dst=fa:16:3e:d2:be:f1 actions=goto_table:100
cookie=0x0, duration=2473.940s, table=90, n_packets=223, n_bytes=42422, priority=0 actions=goto_table:100
cookie=0x0, duration=2473.953s, table=100, n_packets=275, n_bytes=49234, priority=0 actions=goto_table:110
cookie=0x0, duration=2046.043s, table=110, n_packets=11, n_bytes=1000, tun_id=0x41f,dl_dst=fa:16:3e:e8:97:07 actions=output:1
cookie=0x0, duration=1958.904s, table=110, n_packets=11, n_bytes=1000, tun_id=0x40e,dl_dst=fa:16:3e:6d:c2:e7 actions=output:1
cookie=0x0, duration=1933.314s, table=110, n_packets=11, n_bytes=1000, tun_id=0x442,dl_dst=fa:16:3e:ff:b8:b4 actions=output:1
cookie=0x0, duration=2473.923s, table=110, n_packets=147, n_bytes=33870, priority=0 actions=drop