Husky HME-423E IEEE 802.1Q Tag-based VLAN, 4-6.11.2.1, 802.1Q Configuration, VLAN Operation Mode

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4-6.11.2 IEEE 802.1Q Tag-based VLAN

Tag-based VLAN is an IEEE 802.1Q standard which allows 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.

All ports on the switch belong to default VLAN, VID is 1. The default VLAN can’t be deleted. The maximum VLAN group is up to 64.

Virtual Local Area Network (VLAN) can be implemented on the switch to logically create different broadcast domain.

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 considered as members of the same broadcast domain. The valid VLAN ID number ranges from 1 to 4094. The amount of VLAN groups is up to 256 including default VLAN that cannot be deleted.

Each member port of an 802.1Q VLAN group is on either an Access Link (non VLAN-tagged) or a Trunk Link (VLAN-tagged). All frames on an Access Link carry no VLAN identification, while all frames on a Trunk Link are VLAN-tagged. In addition to above-mentioned 2 types, there is the third mode—Hybrid. A Hybrid Link can carry both VLAN-tagged frames and untagged frames. A single port is supposed to belong to one VLAN group, except 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, the communication across switches also can make the packet sent through tagged and untagged ports.

4-6.11.2.1	802.1Q Configuration
VLAN Operation Mode		Select 802.1Q from the drop down list to configure Tag-based VLAN
		settings.
		Only when the VLAN members, whose Untagged VID (PVID) equals to
Management VLAN ID		the value in this column, will have the permission to access the switch.
		The default value is 0, meaning this limit is not enabled (all members in
		different VLANs can access this switch).
		GVRP (GARP VLAN Registration Protocol) is a protocol that facilitates
Enable GVRP		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

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