FreshTomato supports VLAN (Virtual LAN) configurations. The user can create up to 16 VLANs. A VLAN can use a VID between 1 and 4094.
Please use FreshTomato 2021.8 and newer to make VLANs work properly on ALL ARM and MIPS router. (See examples below.)

• VLAN - The VLAN's unique identifier. (VLAN 0 to VLAN 15)
• VID - Allows overriding “traditional” VLAN / VID mapping (Example: VLAN 4 to VID 4) with arbitrary VIDs for each VLAN (set to “0” to use “regular” VLAN/VID mappings instead).
• Ports 1 - 4 & WAN - Specifies which Ethernet ports on the router should be members of this VLAN.
• Tagged - Enable 802.1Q tagging of Ethernet frames on a particular port/VLAN.
• Default - The VLAN ID assigned to untagged frames that the router receives.
• Bridge - Determines if this VLAN ID should be treated as WAN, part of a LAN bridge or just left as is (a member of an 802.1Q trunk, being managed manually via scripts, etcetera).

This section contains the assignments of wireless interfaces to various LAN bridges.

It is recommended that you determine and/or verify correct settings on the Virtual Wireless and Network menus to ensure proper VLAN operation.

Other mandatory settings:

• One VID must be assigned to WAN.
• One VID must be selected as the default.
• To prevent 802.1Q compatibility issues, avoid using VID “0” , as 802.1Q specifies that frames with a tag of “0” do not belong to any VLAN (the tag contains only user priority information).
  

Avoid using VID “1” , as some vendors label it as “special” or “reserved” for management purposes.

Configuration example for German Telekom ISP

Europe's biggest telecommunications company supports a dual-stack setup (IPv4 & IPv6) and for the WAN Port you need a VLAN tag with the value of 7 (VID 7).

IMPORTANT NOTE: As described earlier, please use FreshTomato 2021.8 or newer for VLAN functions to work properly.

All older versions (including Shibby/Toastman/AdvancedTomato.) may not work as expected.

PPPoE connection only works using the following workaround:

Example 1: If you are using FT 2021.7 to connect to German Telekom ISP (needs PPPoE with VID 7) ⇒ you have to use VLAN 7 using VID 7 (“traditional” VLAN/VID mapping)

Example 2: If you are using FT 2021.7 to connect to Freedom internet (https://freedom.nl needs PPPoE, only possible with VLAN 6 using VID 6) see https://www.linksysinfo.org/index.php?threads/fork-freshtomato-arm-development-discussion-only-for-support-always-open-your-own-thread.74117/page-245#post-330148

Example 3: If you are using FT 2021.7 to connect to Vivo FTTH (Brazil) (needs PPPoE, only possible with VLAN 10 using VID 10) see https://www.linksysinfo.org/index.php?threads/fresh-tomato-r7000-vlan-issue-on-ftth-provider.76958/#post-330955

Starting with release 2021.8, you can select or use any VLAN 0 to 15 (see picture above for example 1 (Telekom ISP), now using VLAN 5 with VID 7)