p 15:36:15 15:36 SymbolA1:D4E1 dabswlan 15:36:15 15:3E Avonet:57:90.88 weec20weep Short 15:38:15 15:38 00:06:25:53:0c:08 15:36:15 15:36 SymbolA1 D4E5 nocwinn 15:39:15 15:36 LucentFDC8:C7 15:36:15 15:36 175:61:37:63 303com 15:36:15 15:36 SymbolA28F61 hdwlan 15:36:15 15:38 SymbolA20F66 noowlan 15:36:15 15:30 SSID (18) Nokia D4 an labowsec 15:38:15 15:38 AdHoc Symbol 63 Symbol 15:36:15 15.3E Intrastructure P (18) STA(G) Expert Advice Performance (4.0.18) Security (28.3.0) Frame Address Type Unicast (30%) Muticast(11 Broadcast (69%) Broadcast Multicard Total Frames Scan Stopped Start Channel Infrastructure AirWISE Charts Decodes Tools Figure 7-6: WLAN Management Software Display (Courtesy of AirMagnet Inc. © 2006 AirMagnet R is a registered trademark.) thought and planning if the effectiveness of the network is to be maintained. The addition of an access point, perhaps aimed at filling in a coverage gap or providing additional network capacity for a new concentration of users, could easily have the opposite effect on performance if the new hardware is not configured for coexistence with the existing set-up, with appropriate channel selection, transmit power and security settings. A documented set of network policies and a supporting change control procedure will ensure that future change is managed in such a way that performance is maintained or enhanced. Network policies may address issues such as; Supported standards (e.g. 802.11b/g) Supported hardware vendors or NIC models SSID management Security and encryption requirements (e.g. personal firewalls, WEP/WPA). Implementing Wireless LANs A change control procedure should define how proposed changes to the installation, including hardware, software and configuration settings, will be technically reviewed and endorsed prior to implementation. The procedure should cover; Scope of the procedure - what types of changes are controlled Process and documentation required for proposing changes Roles and responsibilities of reviewers and decision makers Authorities required 