如遇到错误“Network is already using parent interface”，需要重置网络：

SSH in as root and remove local-kv.db from

/var/lib/docker/network/files/local-kv.db on most linux or

/volume1/@docker/network/files/local-kv.db on a synology.

参考：

• https://forums.docker.com/t/network-is-already-using-parent-interface/121669
• https://www.reddit.com/r/docker/comments/gr7uds/unable_to_delete_a_macvlannetwork/

Synology 的 Docker 套件在 host 网络中支持 ipv6，但是如自建网络则需要手动开启 ipv6 支持。以下是相关配置：

编辑 /volume1/@appstore/Docker/config/dockerd.json

"ipv6": true,
"fixed-cidr-v6": "2001:db8:1::/64"

参考：

• https://docs.docker.com/config/daemon/ipv6/
• https://www.synoforum.com/threads/has-anyone-been-successful-in-enabling-ipv6-for-the-docker-daemon.435/#post-5865
• https://community.synology.com/enu/forum/1/post/141203