Vlan Description; Vlan Examples; Example 1 - Dell PowerConnect 3048 User Manual

NOTE: You can
change port VLAN
membership settings in
the VLAN Membership
screen.
114
Appendix

VLAN Description

Packets received by the switch are treated in the following ways:
• When an untagged packet enters a port, the system automatically tags
it with the port's default VLAN ID tag number. Each port has a default
VLAN ID setting that is user configurable. The default setting is 1.
Change the default VLAN ID setting for each port from the port's
respective Port Configuration page.
• When a tagged packet enters a port, the default VLAN ID setting has
no effect on the tag.
– The packet proceeds to the VLAN specified by its VLAN ID tag
number.
– If the port in which the packet entered does not belong to the
VLAN specified by the packet's VLAN ID tag, the system drops
the packet.
– If the port belongs to the VLAN specified by the packet's VLAN
ID, the system can send the packet to other ports with the same
VLAN ID.
• Packets leaving the switch are either tagged or untagged depending on
that port's membership properties.
• A U for a given port and VLAN means that packets leaving the switch
from that port and VLAN are untagged. A T for a given port and VLAN
means that packets leaving the switch from that port and VLAN are
tagged with the respective ID for the VLAN to which that port
belongs.

VLAN Examples

In the following two examples, example 1 explains a simple two-group
VLAN setup. Example 2 explains a more elaborate setup, illustrating all
possible scenarios for a comprehensive understanding of tagged VLANs.

Example 1

In the VLAN Administration page, add a new VLAN to the list, shown
1
in the following illustration as New with a VLAN ID value of 2.