NEUTRON's OVS based VXLAN seems to be unable to access the network

[sam]

I found that the cloud host I created cannot connect to the network. The network type is VXLAN, and it cannot even access cloud init
I used this installation document (partially in Chinese) and it was normal around 2022, but it cannot be used after updating the software source recently.

The use of VXLAN in cloud hosts has the following faults
(1) Unable to access network resources other than ICMP (ping), and even curl http://169.254.169.254 (This also leads to the inability to use cloud init)
(2) Sometimes unable to ping 169.254.169.254 for unknown reasons.

All firewalls and security groups are allowed or closed.

My network situation is as follows
Internal (vxlan) 10.0.0.0/24 Gateway 10.0.0.1
Router gateway 10.0.0.1 → 192.168.10.121
External (flat) 192.168.10.11.0/24 Gateway 192.168.10.1.1

If any other information is needed, I can provide it and hope to fix this error.

system version:ubuntu 22.04 last version (online )
openstack Y version

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-----------------------------------
发布：20.5.1.dev23 于 2022-03-01 21：07：17
SHA： 34e97943a8190a33d72458ce39aaa5f82e0855b9
来源： https://opendev.org/openstack/neutron/src/doc/source/install/
URL： https://docs.openstack.org/neutron/yoga/install/

[sam (sam22926)]

at cloud host (vxlan) cmd

[Slawek Kaplonski (slaweq)]

This don't looks like Neutron bug really and more like some misconfiguration or something like that. If You can't reach metadata service from Your instance, please check if haproxy service for metadata was spawned in the router namespace. You need also to check e.g. with tcpdump where your connection is stopped. That may give you some clue what and where is wrong.

I am closing this as not a bug in Neutron and recommend You to go the the <email address hidden> mailing list to get support there.