Hi Neutron, I've deployed Rocky-rc2 version on Debian Buster(compute node), kernel Linux 4.19 Now the issue: The VM running on the Host(Debian Buster) could not get IP when Booting. I use tcpdump to get the packet on tap, qbr, qvb and qvo. *The DHCP broadcast packet could be dumped at tap and qbr, but not at qvo/qvb.* So the DHCP failed. All the firewall policy is neutron automatic generated. The firewall policy is never changed. (neutron-openvswitch-agent)[root@** /]# iptables -S | grep tapba5cd56c-46 -A neutron-openvswi-FORWARD -m physdev --physdev-out tapba5cd56c-46 --physdev-is-bridged -m comment --comment "Direct traffic from the VM interface to the security group chain." -j neutron-openvswi-sg-chain -A neutron-openvswi-FORWARD -m physdev --physdev-in tapba5cd56c-46 --physdev-is-bridged -m comment --comment "Direct traffic from the VM interface to the security group chain." -j neutron-openvswi-sg-chain -A neutron-openvswi-INPUT -m physdev --physdev-in tapba5cd56c-46 --physdev-is-bridged -m comment --comment "Direct incoming traffic from VM to the security group chain." -j neutron-openvswi-oba5cd56c-4 -A neutron-openvswi-sg-chain -m physdev --physdev-out tapba5cd56c-46 --physdev-is-bridged -m comment --comment "Jump to the VM specific chain." -j neutron-openvswi-iba5cd56c-4 -A neutron-openvswi-sg-chain -m physdev --physdev-in tapba5cd56c-46 --physdev-is-bridged -m comment --comment "Jump to the VM specific chain." -j neutron-openvswi-oba5cd56c-4 (neutron-openvswitch-agent)[root@*** /]#* iptables -S | grep neutron-openvswi-oba5cd56c-4* -N neutron-openvswi-oba5cd56c-4 -A neutron-openvswi-INPUT -m physdev --physdev-in tapba5cd56c-46 --physdev-is-bridged -m comment --comment "Direct incoming traffic from VM to the security group chain." -j neutron-openvswi-oba5cd56c-4 -A neutron-openvswi-oba5cd56c-4 -s 0.0.0.0/32 -d 255.255.255.255/32 -p udp -m udp --sport 68 --dport 67 -m comment --comment "Allow DHCP client traffic." -j RETURN -A neutron-openvswi-oba5cd56c-4 -j neutron-openvswi-sba5cd56c-4 -A neutron-openvswi-oba5cd56c-4 -p udp -m udp --sport 68 --dport 67 -m comment --comment "Allow DHCP client traffic." -j RETURN -A neutron-openvswi-oba5cd56c-4 -p udp -m udp --sport 67 --dport 68 -m comment --comment "Prevent DHCP Spoofing by VM." -j DROP -A neutron-openvswi-oba5cd56c-4 -m state --state RELATED,ESTABLISHED -m comment --comment "Direct packets associated with a known session to the RETURN chain." -j RETURN -A neutron-openvswi-oba5cd56c-4 -j RETURN -A neutron-openvswi-oba5cd56c-4 -m state --state INVALID -m comment --comment "Drop packets that appear related to an existing connection (e.g. TCP ACK/FIN) but do not have an entry in conntrack." -j DROP -A neutron-openvswi-oba5cd56c-4 -m comment --comment "Send unmatched traffic to the fallback chain." -j neutron-openvswi-sg-fallback -A neutron-openvswi-sg-chain -m physdev --physdev-in tapba5cd56c-46 --physdev-is-bridged -m comment --comment "Jump to the VM specific chain." -j neutron-openvswi-oba5cd56c-4 Pls help to give some advices about that. Thanks a lot!