Defining VLAN Membership

The Port to VLAN and Port VLAN Membership pages display the VLAN memberships of the ports in various presentations. You can use them to add or remove memberships to or from the VLANs.

When a port is forbidden default VLAN membership, that port is not allowed membership in any other VLAN. An internal VID of 4095 is assigned to the port.

To forward the packets properly, intermediate VLAN-aware devices that carry VLAN traffic along the path between end nodes must either be manually configured or must dynamically learn the VLANs and their port memberships from Generic VLAN Registration Protocol (GVRP).

Untagged port membership between two VLAN-aware devices with no intervening VLAN-aware devices, should be to the same VLAN. In other words, the PVID on the ports between the two devices must be the same if the ports are to send and receive untagged packets to and from the VLAN. Otherwise, traffic might leak from one VLAN to another.

VLAN-tagged frames can pass through VLAN-aware or VLAN-unaware network interconnection devices. If a destination end node is VLAN-unaware, but is to receive traffic from a VLAN, then the last VLAN-aware device (if there is one), must send frames of the destination VLAN to the end node untagged. That is, the egress port that reaches the end node must be an untagged member of the VLAN.