Dear Brian Haley I found several blocking rules in the namespace of the router. I tried to clean it up, (CMD: iptables - F) However, the current situation remains unchanged. Could you please tell me again what I can do. Thank you From SAM ##cmd,start root@controller:~# ip netns qrouter-48610214-6030-4e7e-8fe8-c60241e7c89c (id: 2) qdhcp-2aa854ba-7fa6-43e4-989e-e97dafd777ee (id: 0) qdhcp-c7d9811d-1fcc-4aee-8f01-6f556fb56044 (id: 1) root@controller:~# ip netns exec qrouter-48610214-6030-4e7e-8fe8-c60241e7c89c bash root@controller:~# root@controller:~# iptables --list Chain INPUT (policy ACCEPT) target prot opt source destination neutron-l3-agent-INPUT all -- anywhere anywhere Chain FORWARD (policy ACCEPT) target prot opt source destination neutron-filter-top all -- anywhere anywhere neutron-l3-agent-FORWARD all -- anywhere anywhere Chain OUTPUT (policy ACCEPT) target prot opt source destination neutron-filter-top all -- anywhere anywhere neutron-l3-agent-OUTPUT all -- anywhere anywhere Chain neutron-filter-top (2 references) target prot opt source destination neutron-l3-agent-local all -- anywhere anywhere Chain neutron-l3-agent-FORWARD (1 references) target prot opt source destination neutron-l3-agent-scope all -- anywhere anywhere Chain neutron-l3-agent-INPUT (1 references) target prot opt source destination ACCEPT all -- anywhere anywhere mark match 0x1/0xffff DROP tcp -- anywhere anywhere tcp dpt:9697 Chain neutron-l3-agent-OUTPUT (1 references) target prot opt source destination Chain neutron-l3-agent-local (1 references) target prot opt source destination Chain neutron-l3-agent-scope (1 references) target prot opt source destination DROP all -- anywhere anywhere mark match ! 0x4000000/0xffff0000 ##(clear rule) root@controller:~# iptables -F root@controller:~# iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination Chain neutron-filter-top (0 references) target prot opt source destination Chain neutron-l3-agent-FORWARD (0 references) target prot opt source destination Chain neutron-l3-agent-INPUT (0 references) target prot opt source destination Chain neutron-l3-agent-OUTPUT (0 references) target prot opt source destination Chain neutron-l3-agent-local (0 references) target prot opt source destination Chain neutron-l3-agent-scope (0 references) target prot opt source destination ##cmd,stop