Other common problems resulting from initial RF installation can sometimes be identi?¬?ed
by answering the following questions:
?– Is the radio enabled on both the access point and client for the correct RF (2.4 GHz
ISM or 5 GHz UNII)?
?– Is an external antenna connected and facing the correct direction (straight upward for
dipole)?
?– Is the antenna location too high or too low relative to wireless clients (within 20
vertical feet)?
?– Are there metal objects in the room re?¬‚ecting RF and causing poor performance?
?– Is the AP the client is attempting to reach at too great of a distance?
Table 3-3 Versions and Features
Version Topic Example
V1 Security Wi-Fi compliant; 802.1x, LEAP, Cisco Key Integrity Protocol
V2 Scaling WPA, access point??“assisted roaming
V3 Performance and security WPA2, Wi-Fi Multimedia (WMM)
V4 Voice over WLAN Call Admission Control (CAC), voice metrics, UPSD
V5 Management and IPS Management Frame Protection (MFP), client reporting
Implementing a WLAN 229
The ?¬?rst step in troubleshooting a suspected wireless issue is to break the environment into
wired network versus wireless network. Then, further divide the wireless network into
con?¬?guration versus RF issues.
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