about vxlan and gre

[liushuangfa666]

I am a newbie. When I tried to create a VXLAN network using Neutron, it showed that VXLAN is not supported. Is this a configuration issue on my part, or is OVN’s support for VXLAN limited? The same issue occurs with GRE, while other types of networks can be created normally。
The following is the error log：
2024-10-29 13:59:36.970 13473 ERROR neutron.plugins.ml2.managers [req-4c3cd808-5574-4b72-83ed-a3f94ace1d42 cdb809daa0de46ea96c4fa684793e8e7 d6058da4ee404b2199ebf61c664e3b00 - default default] Mechanism driver 'ovn' failed in create_network_precommit: InvalidInput: Invalid input for operation: Network type vxlan is not supported.

[numansiddique]

Thanks for the report.

I think you need to report this issue against openstack neutron project.

OVN mainly supports Geneve. VxLAN is supported but has limitations.

Please see - https://docs.ovn.org/en/latest/faq/general.html (and see the question - "Why does OVN use STT and Geneve instead of VLANs or VXLAN (or GRE)"). Although this is a bit outdated.

and b07f1bc