Planning the Deployment of APs

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

After determining where to locate APs, you need to make additional decisions about how you will deploy the APs. These decisions affect the types of equipment required, where the equipment should be located, and how the equipment will be installed

Will you install the APs on the walls of your building or in the plenum area?

If you place your APs in the plenum area, you must determine the best method for powering the APs. Consult with the AP manufacturer to determine how to meet the power requirements for the APs. Some wireless APs can receive electrical power through the Ethernet cable.

The plenum area is regulated by fire codes. Therefore, for plenum placement, you must purchase APs that are fire-rated.

Will you preconfigure APs before installing them or configure them remotely?

Preconfiguring the APs before installing them on location can speed up the deployment process and can save labor costs, because less skilled workers can perform the physical installation. You can preconfigure APs by using the console port (serial port), Telnet, or a Web server that is integrated with the AP. If you will use a terminal server for console configuration of APs, decide where to locate the terminal server. Regardless of whether you decide to preconfigure the APs, make sure that you can access them remotely, particularly if you deploy many APs. This enables you to configure or upgrade the APs remotely by using scripts.

The terminal server can be located on the same subnet as the APs, or elsewhere.

It is helpful to physically locate the terminal server in the same wiring closet as the hub or patch panel connecting the AP. With this arrangement, you can pull together the Ethernet and console (serial) wires at the same time. This is only possible if the wires are run to and from the same place. You can then complete the configuration of many APs from a central location.

What model of antenna will you use for the APs?

For example, in a building with multiple floors, an omnidirectional antenna — which propagates the signal equally in all directions except the vertical — might work best. For information about which type of antenna will work best for your WLAN deployment, see the documentation for your APs.

What model of AP will you purchase?

The AP must be able to be configured as a RADIUS client and must support Wired Equivalent Privacy (WEP) and 802.1X authentication.

Example: An Enterprise Corporation Mounts APs in the Plenum Area

An enterprise corporation learned that mounting its APs in the plenum area would resolve some of the issues raised during their pilot test of their wireless network deployment.

For instance, users often disconnected data and power cables from the APs in order to plug their portable computers into the network. The unavailable APs prompted many service calls to the Help desk.

In addition, the IT staff found that by mounting APs in the plenum area, they could install APs in doorways and halls, avoiding users’ offices. Though the initial installation cost was higher, they believe the placement will pay off in the long term in decreased user interference during working hours.

The enterprise corporation worked closely with the manufacturer of the APs to ensure that all procedures were followed and that the wireless APs were fire-rated for plenum placement.