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WS 2000 Wireless Switch System Reference Guide3-12
of the same VLAN. The disadvantage of user-based VLANs is that each client's MAC address must be specified, which
can be very time consuming for large network deployments.
Port-based VLANs, also known as Layer 3 VLANs, partition traffic based on protocol. The switch inspects each packet,
extracts the VLAN membership information, and partitions the packet accordingly. The advantage of this scheme is that
it allows partitioning based on protocol type, and each user does not have to be manually added to the VLAN. The
disadvantage of port-based VLANs is that network performance is generally slower than user-based VLANs. This
performance loss is due to the large amount of overhead required to inspect each packet for the VLAN ID.
2. Use the pull-down menu to select a Trunk Port for the switch. Any one of the switch's six ports that is not associated
with a subnet can be configured as the Trunk Port for a user-based VLAN.
A Trunk Port allows a type of VLAN partitioning that is transparent to the users connected to that port. All traffic passing
through the Trunk Port is tagged with the default VLAN ID tag.
Ports that are associated with a subnet are not available in the Trunk Port pull-down menu.
To disassociate a port from a subnet (so that is can be assigned as the trunk port), go to the
appropriate subnet on the menu, select the desired port, and then click Delete. After clicking
the Apply button on the subnet screen, return to the VLAN page, and the port will be
available in the Trunk Port pull-down menu.
3. Enter a VLAN Tag between 1 and 31. This tag will be associated with all VLAN traffic that goes out through the Trunk
Port in a user-based VLAN. This tag should be the one used to share information between the various VLANs. This value
should also be either one of the user-based or port-based VLANs.
The next step is to specify the mapping between the available subnets and the VLANs that you are defining. In the mapping
table, each of the four subnets are listed by name; however, only subnets that are currently active can be configured with a
VLAN ID.
4. Enter the VLAN ID value for each subnet. The value must be between 1 and 31. The WS 2000 Wireless Switch only
supports VLANs numbered between 1 and 31 in user-based VLANs. If your network uses a VLAN number higher than
31, you will not be able to use VLAN trunking with this switch.
5. In the Trunked VLANs field, enter in the VLAN IDs for VLANs that you wish to configure as trunked VLANs. When
entering multiple VLAN IDs, separate each ID with a comma. To qualify as a trunked VLAN, the VLAN ID must be
associated with a configured subnet.
The Trunk Enable box will be automatically checked on subnets for which VLAN IDs have been selected as trunked
VLANs.
6. Click the Apply button to save changes.