Eion LibraPlus 5845, User Manual, Page: 79 / 140

• Three-bit user priority
• One-bit canonical format indicator (CFI)
• Twelve-bit VLAN identifier (VID) – Uniquely identifies the VLAN to which the frame belongs
LibraPlus VLAN interfaces always transmit and receive tagged frames. Virtual LANs operate at Layer 2
(the data link layer) of the OSI model. Each VLAN maps directly to an IP network, or subnet, which
gives the appearance of involving Layer 3 (the network layer). LibraPlus supports up to 32 virtual
LAN interfaces.
4.5.1.1. Point-to-Point VLAN System
For Point-to-Point applications VLAN subinterfaces are not required, the bridge is completely trans-
parent to VLAN tags.
4.5.1.2. Point-to-Multipoint VLAN System
In this example we would like to transfer the engineering data behind the access point to a remote site
where station 1 is located.
Fig. 4.1. Multipoint VLAN Configuration
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Configuration