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Appendix B: VLAN Description and Examples
Packets received by the switch will be treated in the following way with regard to the Switch’s VLAN settings:
1. When an untagged packet enters a port, it will be automatically tagged 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). The default VLAN ID setting for each port can be changed in that port’s respective screen in
the Port Specific sub-menu (Port Manager/Port Specific).
2. When a tagged packet enters a port, the tag for that packet will be unaffected by the default VLAN
ID Setting.
3. The packet will now proceed to the VLAN specified by its VLAN ID tag number.
4. If the port in which the packet entered does not have membership with the VLAN specified by the
packets VLAN ID tag, the packet will be dropped. Port VLAN membership settings are changed in
the VLAN Membership page (VLAN Setup/VLAN Membership).
5. If the port has membership to the VLAN specified by the packet’s VLAN ID, the packet will be able
to be sent to other ports with the same VLAN ID membership.
6. Packets leaving the switch will be either tagged or untagged depending on the setting specified for
that port’s membership properties.
7. A ‘U’ for a given port and VLAN will mean that packets leaving the switch from that port and VLAN
will be Untagged. A ‘T’ for a given port and VLAN will mean that packets leaving the switch from
that port and VLAN will be tagged with the respective VLAN ID in which it participated in.
Two examples of VLAN setup will be given. Example 1 will step through a simple two-group VLAN setup.
Example 2 will step through a more elaborate setup illustrating all possible scenarios for a comprehensive
understanding of tagged VLANs. These examples are shown from the Console interface.
Example 1
1. In the VLAN Administration page, add a new VLAN to the list, shown below as “New” with a VLAN
ID value of 2.
2. In the VLAN Membership page, use the space bar to toggle matrix until the desired ports are all
members of the selected VLAN.