Lantech 2204F Series User Manual page 73


802.1Q VLAN Setting:
Enable GVRP mode and define the Management VLAN ID.
GVRP (GARP VLAN Registration Protocol or Generic 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.

Port Setting:
Select the port you want to configure.

Link Type: There are 4 types of link type.
1. Access Link: A segment which provides the link path for one or more
stations to the VLAN-aware device. An Access Port (untagged port),
connected to the access link, has an untagged VID (also called PVID). After
an untagged frame gets into the access port, the switch will insert a four-byte
tag in the frame. The contents of the last 12-bit of the tag is untagged VID.
When this frame is sent out through any of the access port of the same PVID,
the switch will remove the tag from the frame to recover it to what it was.
Those ports of the same untagged VID are regarded as the same VLAN group
members.
Note: Because the access port doesn't have an understanding of tagged
frame, the column field of Tagged VID is not available.
2. Trunk Link: A segment which provides the link path for one or more VLAN-
aware devices (switches). A Trunk Port, connected to the trunk link, has an
understanding of tagged frame, which is used for the communication among
VLANs across switches. Which frames of the specified VIDs will be forwarded
depends on the values filled in the Tagged VID column field. Please insert a
comma between two VIDs.
Note:
A trunk port doesn't insert tag into an untagged frame, and therefore the
untagged VID column field is not available.
It's not necessary to type '1' in the tagged VID. The trunk port will forward the
frames of VLAN 1.
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