y of the basic configuration parameters that will be applicable in all cases. If the access point is a dual- or tri-mode device, with multiple radios, each will require separate configuration. Some access points may also allow other PHY layer parameters to be configured, such as the fragmentation Implementing Wireless LANs Table 7-13: Access Point Configuration Parameters Parameter Configuration considerations IP address (plus The access point may have a default IP address, subnet mask and defined by the manufacturer, that will enable a direct default gateway) connection through a web browser. Alternatively an IP address may be assigned to the access point by a DHCP server in the wired network or a static IP address (plus subnet mask and default gateway) may be assigned by connecting a PC to the access point's configuration port. The service set ID should be changed from its default value as a basic security measure in every network. A policy for SSID assignment may be defined for large WLAN installations. SSID broadcast SSID broadcast within beacon frames can be either enabled or disabled. Disabling SSID broadcast is a further security measure, discussed in Chapter 8. Maximum transmit Setting the maximum allowable transmit power level power to comply with local regulations. Radio channel Selection of the operating channel within the range allowed by local regulations. Some access points may include an automatic search for the least congested channel. Operating mode In the case of 802.11g networks, a selection can be made between mixed mode and g-only mode, depending on whether 802.11b stations will also be operating in the network. Security Selection of security modes (64-bit WEP, 128-bit WEP, WPA-PSK, etc.) and entry of passphrase or encryption keys, transmit key and authentication mode (described further in Chapter 8). Antenna configuration An access point with multiple antennas may be configured to use one specified antenna, or to use all antennas in diversity mode - selecting the antenna that gives the stron