UNICOM Electric SmartGST-2402M - Manual (Page 65)

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5-4-7-2. 802.1Q (802.1Q VLAN)
In this page, users can create Tag-based VLAN and enable or disable GVRP protocol.
There are 256 VLAN groups to available. If 802.1Q VLAN is enabled, all ports on the
switch belong to the default VLAN, called VID # 1. The default VLAN can’t be deleted.
GVRP (GARP [Generic Attribute Registration Protocol] VLAN Registration
Protocol)
GVRP allows automatic VLAN configuration between the switch and nodes. If the switch
is connected to a device with GVRP enabled, you can send a GVRP request using the
VID of a VLAN defined on the switch. The switch will automatically add that device to
the existing VLAN.