iES26G Series User’s Manual
iS5 Communications Inc.
35
4.1.7
VLAN
A Virtual LAN (VLAN) is a logical network grouping that limits the broadcast domain, which
allows the network traffic to be isolated. Only members of the same VLAN will receive traffic
from the other members of the VLAN. Basically, to create a VLAN from a switch is the
equivalent of reconnecting a group of network devices to another Layer 2 switch.
However, all the network devices are still plugged into the same switch physically.
This managed switch supports port-based, and 802.1Q (tagged-based) VLAN. The default
configuration of VLAN operation mode is “
802.1Q
”.
4.1.7.1
VLAN Setting
Tagged-based VLAN is an IEEE 802.1Q specification standard. It allows the creation of VLAN’s
across devices from different switch vendors. IEEE 802.1Q VLAN uses a technique which
inserts a “tag” into the Ethernet frames. A tag contains a VLAN Identifier (VID) that indicates
the VLAN numbers.
Tag-based VLAN’s can be created, enabled or disabled using the GVRP protocol. There are
256 VLAN groups available. Default VLAN (VID is 1) is created when 802.1Q VLAN is enabled
on all ports of the switch. The default VLAN cannot be deleted.
GVRP allows automatic VLAN configuration between the switch and nodes. If the switch is
connected to a device with GVRP enabled; a GVRP request can be sent using the VID of a
VLAN defined on the switch; the switch will automatically add that device to the existing
VLAN
VLAN Configuration – 802.1Q interface
