tap issue

https://juejin.cn/post/7488988029865050163
https://www.cnblogs.com/goldsunshine/p/11946098.html
https://www.eet-china.com/mp/a271416.html

https://beachboyy.blog.csdn.net/article/details/118929815

https://arthurchiao.art/blog/ovs-deep-dive-6-internal-port/

https://blog.csdn.net/u013743253/article/details/119601088
https://blog.csdn.net/u013743253/article/details/119895704

https://blog.csdn.net/shaoyunzhe/article/details/80081366

https://blog.csdn.net/lingshengxiyou/article/details/128649895

https://lewisdenny.io/tracing_packets_out_an_external_network_with_ovn/

https://docs.openstack.org/operations-guide/ops-network-troubleshooting.html