Lantech LES-2400-RPS, User Manual

Page: 61 / 99

57
802.1Q VLAN
When the VLAN operation mode is set on 802.1Q, all ports on the switch belong to the
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 number between 1 and 4094. The
amount of VLAN groups is up to 256 including the default VLAN that cannot be deleted.
GVRP (GARP VLAN Registration Protocol) is a protocol that facilitates control of 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,
with GVRP enabled, the switches are able to automatically exchange the information of
their VLAN database. Therefore, the user needn
‘t manually configure the link type. The
packets belonging to the same VLAN can communicate across switches.
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. Besides, 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 a particular 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.
Please follow the instructions below to configure the 802.1Q VLAN.

Click the pull-down menu to select
802.1Q
and click Apply to configure the VLAN
Operation Mode on 802.1Q .

Enable GVRP Protocol: Tick this checkbox to enable GVRP protocol. This
checkbox is available while the VLAN Operation Mode is set on 802.1Q .

Management VLAN ID: Only the VLAN members, whose Untagged VID (PVID)
equals to the value specified in this field, have permission to access the switch. The
default value is
‗0‘ that means this limit is not enabled (all members in different
VLANs can access this switch).