Defining VLAN Membership

The Port to VLAN Page enables mapping ports to VLANs. A port can belong to multiple VLANs if it is in Trunk or General modes.

The view on this page provides the information per VLAN. To change membership on a per port basis, use the VLAN To Port Page.

If a frame is sent VLAN-tagged, a four-byte tag (VLAN tag) is added to each Ethernet frame, increasing the maximum frame size from 1518 to 1522. The tag contains the VLAN ID (0 - 4095) and the VLAN Priority Tag (VPT) (0-7) (see the QoS General Configuration for details on VPT).

All intermediate VLAN-aware devices, carrying VLAN traffic along the path between end nodes, must be either manually configured with the VLAN port membership or dynamically learned from GVRP.

Untagged port membership, between two VLAN-aware devices with no intervening VLAN- aware devices, should be to the same VLAN. Otherwise, traffic will leak from one VLAN to another.

VLAN-tagged frames can pass through VLAN-aware or VLAN-unaware network interconnection devices. If none of the intermediate network devices to an end node support VLAN, then the port on the last device that reaches the end node must be an untagged VLAN member.

Note the following points:

Mapping Interfaces to VLAN

The Port to VLAN Page enables you to map ports or LAGs to a VLAN.

To map ports or LAGs to a VLAN:

Click VLAN Management > Port to VLAN. The Port to VLAN Page opens.

Select a VLAN from the VLAN list. The default VLAN can also be selected.

Each port or LAG is marked with one of the following modes:

For each port or LAG, select one of the following values:

For each port or LAG, one or both of the following values may be selected: