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| Featured Functions |
VLANs: Tagged and Untagged Membership
The
A typical host (e.g., clients) will be untagged members of one VLAN, defined as Access Port in
The IEEE Std
To carry multiple VLANs across a single physical (backbone, trunk) link, each packet must be tagged with a VLAN identifier so that the switches can identify which packets belong in which VLAN. To communicate between VLANs, a router must be used.
The
yAccess Port: The port connects to a single device that is not tagged. The user must define the default port PVID that assigns which VLAN the device belongs to. Once the ingress packet of this Access Port egresses to another Trunk Port (the port nePT all packets to carry tag information),
yTrunk Port: The port connects to a LAN that consists of untagged devices/tagged devices and/or switches and hubs. In general, the traffic of the Trunk Port must have a Tag. Users can also assign PVID to a Trunk Port. The untagged packet on the Trunk Port will be assigned the port default PVID as its VID.
The following section illustrates how to use these ports to set up different applications.