FreshTomato supports Virtual LAN (VLAN) configurations that conform to the 802.1Q standard. The user can create up to 16 VLANs. A VLAN can use a VID between 1 and 4094.

If you are new to VLANs, here is an excellent introductory video:

Practical Networking - What are VLANs

For VLANs to work properly on ARM and MIPS routers, please use release 2021.8 or later. (See examples.)

• VLAN - this VLAN's unique identifier. (VLAN 0 to VLAN 15)
• VID - allows overriding “traditional” VLAN/VID mapping (Such as: VLAN 4 to VID 4)
  with arbitrary VIDs for each VLAN. (Use “0” for “regular” mappings instead).
• Ports 1 to 4 and WAN - specify which Ethernet ports will 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 (member of an 802.1Q trunk, managed manually via scripts).

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

You should check/verify the correct settings on the Virtual Wireless and Network menus to ensure proper VLAN operation.

The following settings are also mandatory:

• One VID must be assigned to the WAN interface.
• One VID must be selected as the default.
• Avoid using VID: “0” to prevent 802.1Q compatibility issues.
  802.1Q specifies that frames tagged with “0” don't belong to any VLAN.
  (This tag contains only user priority details). Wikipedia: 802.11Q
• Avoid using VID: “1”. Some vendors label it “special”
  or “reserved” for management.

Configuration example for German Telekom ISP

GT supports a dual-stack setup (IPv4 & IPv6). For the WAN Port, a VLAN tag with a value of 7 (VID 7) is required.

As mentioned earlier, for VLANs to function properly, please use FreshTomato 2021.8 or later. Older versions like AdvancedTomato, Shibby, or Toastman, may not work as expected.

PPPoE Connections with FreshTomato 2021.7 and older

PPPoE connections work only when the following workaround is implemented:

Example 1: FreshTomato 2021.7 is being used to connect to German Telekom ISP.
German Telekom uses PPPoE with VID: “7”.
⇒ you must use VLAN: “7” using VID: “7” (a “traditional” VLAN/VID mapping).

Example 2: FreshTomato 2021.7 is being used to connect to Freedom Internet.
Freedom uses PPPoE , and VLAN: “6” using VID: “6”

See: FreshTomato-ARM - development discussion only - Freedom.nl PPPoE

Example 3: FreshTomato FT 2021.7 is being used to connect to Vivo FTTH (Brazil).
Vivo use PPPoE, and VLAN: “10” using VID: “10”

See Tomato Forums: R7000 - VLAN issue on FTTH provider

Since release 2021.8, you can select/use any VLAN from 0 to 15. (See example in above picture for 1 (Telekom ISP), now using VLAN 5 with VID 7)