Hirschmann GREYHOUND GRS1020, Reference Manual

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VLANs
133
UM Config GRS
Release 8.0 09/2019
11 VLANs
In the simplest case, a virtual LAN (VLAN) consists of a group of network participants in one
network segment who can communicate with each other as though they belonged to a separate
LAN.
More complex VLANs span out over multiple network segments and are also based on logical
(instead of only physical) connections between network participants. VLANs are an element of
flexible network design. It is easier to reconfiguring logical connections centrally than cable
connections.
The device supports independent VLAN learning in accordance with the IEEE 802.1Q standard
which defines the
VLAN
function.
Using VLANs has many benefits. The following list displays the top benefits:

Network load limiting
VLANs reduce the network load considerably as the devices transmit Broadcast, Multicast, and
Unicast packets with unknown (unlearned) destination addresses only inside the virtual LAN.
The rest of the data network forwards traffic as normal.

Flexibility
You have the option of forming user groups based on the function of the participants apart from
their physical location or medium.

Clarity
VLANs give networks a clear structure and make maintenance easier.