SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08
37
VLAN
Network definition regardless of the spatial location of the nodes
VLAN (Virtual Local Area Network) divides a physical network into several logical networks
that are shielded from each other. Here, devices are grouped together to form logical groups.
Only nodes of the same VLAN can address each other. Since multicast and broadcast
frames are only forwarded within the particular VLAN, they are also known as broadcast
domains.
The particular advantage of VLANs is the reduced network load for the nodes and network
segments of other VLANs.
To identify which packet belongs to which VLAN, the frame is expanded by 4 bytes. This
expansion includes not only the VLAN ID but also priority information.
Options for the VLAN assignment
There are various options for the assignment to VLANs:
● Port-based VLAN
Each port of a device is assigned a VLAN ID. You configure port-based VLAN in "Layer 2
> VLAN (Page 248)".
● Protocol-based VLAN
Each port of a device is assigned a protocol group.
● Subnet-based VLAN
The IP address of the device is assigned a VLAN ID.
To Next Page
Loading...
