PLANET Web Switch Family Wgsw800.GIF (6460 bytes)

Web / SNMP Intelligent Products

WGSW-800

8-Port Gigabit Ethernet Switch


Appendix A VLAN Description and Examples

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 which is user configurable (the default setting is 1). The default VLAN ID setting for each port can be changed in that port's respective Port Configuration page.
  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 it's 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.
  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 ports 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. Inversely, 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 for setting up VLANs 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.

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.

  1. In the VLAN Membership page, use the space bar to toggle matrix until, the desired ports are all members of the selected VLAN.

  1. To allow untagged packets to participate in the 'New' VLAN, make sure to change the Port VLAN IDs for the relevant ports. To access the Port VLAN ID page hit Ctrl-V. Use the space bar to add an 'X' indicating which PVID is assigned to which port.

Example 2:

  1. Setup the following VLANs:

  1. Configure the VLAN membership has follows:

  1. Setup the Port VLAN IDs as follows (note that port one PVID is set to 2. This must be done in the port specific page since there is no VLAN with ID 2):

The specific ports above have the following Port VLAN ID settings (The Port VLAN ID settings for each port are configured in their respective Port Configuration page or by hitting Ctrl-Vin the VLAN Membership page):

Port 01: 2 Port 05: 10

Port 02: 1 Port 06: 10

Port 03: 1 Port 07: 10

Port 04: 1 Port 08: 10

The following scenarios will produce results as described below:

 


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