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[neutron][Kolla] Failed to get DHCP offer packet at qvo/qvb in compute node


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!
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