logical network; when a device is moved, it still belongs to the same VLAN, so it’s not necessary
to modify its configuration.
2.VLAN ID
Each VLAN has an identification number called VLAN ID (VID), with a range of 0~4095, during
which 0 and 4095 are not used, so the VLAN ID only ranges from 1 to 4094. One VLAN has only
one VLAN ID.
The iSpirit 3026 switch can support a maximum of 255 VLANs. Users need to choose a VLAN ID
among 1-4094 when creating a VLAN.
There are three kinds of frames transmitted in a VLAN: non-tagged frame, frame with VID 0,
frame with VID nonzero. Data packets for these 3 frames are shown in Figure3-1.
Figure3-1.3 Data packets for these 3 frames
All frames are tagged inside a switch. If a non-tagged frame is transferred to the switch, it will tag
the frame by choosing a VLAN ID and filling it into the frame VID; If a frame with VID 0 is
inputted, the switch will also choose a VLAN ID for it; For a frame with a nonzero VID, no change
by the switch.
3.Member ports types of VLAN
The iSpirit 3026 switch supports Port-based VLAN and 802.1Q VLAN. A VLAN has two kinds of
ports: untagged port and tagged port, and a VLAN can have them simultaneously.
There can be no port, one or more ports in a VLAN. When a port belongs to a VLAN, it can be
either untagged or tagged.
A port can be an untagged member port of only one VLAN. When a port is configured to be
