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VLAN overview
Virtual LANs (VLANs) are made up of networked devices that are grouped logically into
separate networks. You can group ports on a switch to create a virtual network made
up of the devices connected to the ports.
You can group ports in VLANs using either port-based or 802.1Q criteria:
•
Port-based VLANs. Assign ports to virtual networks. Ports with the same VLAN ID
are placed in the same VLAN. This feature provides an easy way to partition a network
into private subnetworks.
If the switch is the only switch in your network and you do not need a VLAN to function
across multiple network devices (such as a router, another switch, a WiFi AP, or any
network device that supports VLANs), we recommend that you use a port-based
VLAN. If you need a single VLAN on a single port (other than the uplink port), use
the basic port-based VLAN configuration. If you need multiple VLANs on a single
port, use the advanced port-based VLAN configuration.
The switch supports the following port-based VLAN modes:
-
Basic Port-Based VLAN. In a basic port-based VLAN configuration, ports with
the same VLAN ID are placed into the same VLAN. Except for the uplink port,
you can assign each port to a single VLAN only. The number of VLANs is limited
to the number of ports on the switch.
-
Advanced Port-Based VLAN. In an advanced port-based VLAN configuration,
ports with the same VLAN ID are also placed into the same VLAN, but you can
assign a single port to multiple VLANs.
•
802.1Q VLANs. Create virtual networks using the IEEE 802.1Q standard. 802.1Q
uses a VLAN tagging system to determine which VLAN an Ethernet frame belongs
to. To use an 802.1Q VLAN that is set up on another device, you must know the
VLAN ID.
If you need a VLAN to function across multiple network devices (such as a router,
another switch, a WiFi AP, or any network device that supports VLANs), we
recommend that you use an 802.1Q VLAN. If you do not need to customize tagging
on a single port and you do not need a voice VLAN, use the basic 802.1Q VLAN
configuration. If you do need to customize tagging on a single port or you do need
a voice VLAN, use the advanced 802.1Q VLAN configuration.
The switch supports the following 802.1Q VLAN modes:
-
Basic 802.1Q VLAN. In a basic 802.1Q VLAN configuration, VLAN 1 is added to
the switch and all ports (1 through 5 for the GS305EP or GS305EPP, and 1 through
8 for the GS308EP or GS308EPP) function in access mode as members of VLAN
1. You can change the mode for a port to trunk mode, you can add more VLANs,
and you can assign a different VLAN to a port. A port that functions in access
User Manual33Use VLANS for Traffic
Segmentation
Gigabit Ethernet Plus Switches
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