[OpenWrt Wiki] VLAN
https://openwrt.org/docs/guide-user/network/vlan/switch_configuration05.11.2021 · A very common default VLAN configuration on many off-the-shelf routers is the LAN↔WAN separation. OpenWrt default configuration on such devices does usually mirror the stock configuration. Most of such routers only contain a single network interface (eth0), leading to a 5-port VLAN-enabled switch that is virtually partitioned into a LAN and WAN network by …
[OpenWrt Wiki] VLAN
openwrt.org › docs › guide-userNov 05, 2021 · To use a VLAN you need at least 2 devices supporting VLAN features (as any route requires at least 2 points), which is usually advanced routers, any OpenWrt device, and any self-respecting PC or single-board computer (Windows, MacOS, Linux and BSDs support VLANs). OpenWrt supports IEEE 802.1Q and IEEE 802.1ad VLAN standards.