B&B Electronics EIR618-2SFP-T - Manual - Manual (Page 90)

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Manual Documentation Number: EIR618-2SFP-T_4812m
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802.1Q VLAN
Tagged-based VLAN is an IEEE 802.1Q specification standard. Therefore,
it is possible to create a VLAN across devices from different switch venders.
IEEE 802.1Q VLAN uses a technique to insert a ―tag‖ into the Ethernet
frames. Tag contains a VLAN Identifier (VID) that indicates the VLAN
numbers.
You can create Tag-based VLAN, and enable or disable GVRP protocol.
There are 256 VLAN groups to provide configuration. Enable 802.1Q VLAN,
all ports on the switch belong to default VLAN of VID 1. The default VLAN
can‘t be deleted.
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.
GVRP is based on GARP (Generic Attribute Registration Protocol), a
protocol that defines procedures by which end stations and switches in a
local area network (LAN) can register and de-register attributes, such as
identifiers or addresses, with each other.
Every end station and switch thus has a current record of all the other end
stations and switches that can be reached.
GVRP, like GARP, eliminates unnecessary network traffic by preventing
attempts to transmit information to unregistered users. In addition, it is
necessary to manually configure only one switch and all the other switches
will be configured accordingly.