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6.18.2 802.1Q VLAN
Virtual Local Area Network (VLAN) can be implemented on the switch to logically create
different broadcast domains.
When the 802.1Q VLAN function is enabled, all ports on the switch belong to default
VLAN of VID 1, which means they logically are regarded as members of the same
broadcast domain. The valid VLAN ID is in the range of numbers between 1 and 4094. The
limit of VLAN groups is up to 256 including the default VLAN that cannot be deleted.
Each member port of 802.1Q is on either an Access Link (VLAN-tagged) or a Trunk Link
(no VLAN-tagged). All frames on an Access Link carry no VLAN identification.
Conversely, all frames on a Trunk Link are VLAN-tagged. A third mode (Hybrid) exists. A
Hybrid Link can carry both VLAN-tagged frames and untagged frames. A single port is
supposed to belong to one VLAN group, except when it is on a Trunk/Hybrid Link.
The technique of 802.1Q tagging inserts a 4-byte tag, including VLAN ID of the destination
port—PVID, in the frame. With the combination of Access/Trunk/Hybrid Links,
communication across switches can also be sent through tagged and untagged ports.
802.1Q Configuration
Pull down the selection item and focus on 802.1Q then press
VLAN Operation Mode in 802.1Q mode.
Enable GVRP Protocol: GVRP (GARP VLAN Registration Protocol) is a protocol
that facilitates control of virtual local area networks (VLANs) within a larger network.
GVRP conforms to the IEEE 802.1Q specification, which defines a method of tagging
frames with VLAN configuration data. This allows network devices to dynamically
exchange VLAN configuration information with other devices. For example, having
enabled GVRP on two switches, they are able to automatically exchange the
information of their VLAN database. Therefore, the user doesn't need to manually
configure whether the link is trunk or hybrid, the packets belonging to the same VLAN
can communicate across switches. Tick this checkbox to enable GVRP protocol. This
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Manual Documentation Number EIRP610-2SFP-T – 0912m
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