Cisco AIR-LAP1131G-E-K9 Hardware Installation Guide - Page 62
Checking Basic Settings, Default IP Address Behavior
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Checking Basic Settings Chapter 5 Troubleshooting Autonomous Access Points Checking Basic Settings Mismatched basic settings are the most common causes of lost connectivity with wireless clients. If the access point does not communicate with client devices, check the following areas. Default IP Address Behavior When you connect an 1100 series access point running Cisco IOS Release 12.3(2)JA or later with a default configuration to your LAN, the 1100 series access point makes several attempts to get an IP address from the DHCP server. If it does not receive an address, it assigns itself the IP address 10.0.0.1 for five minutes and does not become a mini-DHCP server. During this five-minute window, you can browse to the default IP address and configure a static address. If after five minutes the access point is not reconfigured, it discards the 10.0.0.1 address and reverts to requesting an address from the DHCP server. If it does not receive an address, it sends requests indefinitely. If you miss the five-minute window for browsing to the access point at 10.0.0.1, you can power-cycle the access point to repeat the process. When you connect an 1100 series access point running Cisco IOS Release 12.2(15)JA or earlier with a default configuration to your LAN, the 1100 series access point makes several attempts to get an IP address from the DHCP server. If it does not receive an address, it assigns itself the IP address 10.0.0.1 and becomes a mini-DHCP server. In that capacity, the access point provides up to twenty IP addresses between 10.0.0.11 and 10.0.0.30 to the following devices: • An Ethernet-capable PC connected to its Ethernet port • Wireless client devices configured to use either no SSID or tsunami as the SSID, and with all security settings disabled The mini-DHCP server feature is disabled automatically when you assign a static IP address to the access point. Caution When the access point is connected to your LAN, the access point mini-DHCP server provides an IP address to any DHCP requests it receives. Default SSID and Radio Behavior In Cisco IOS Relese 12.3(2)JA2 and earlier, the access point radio is enabled by default and the default SSID is tsunami. In Cisco IOS Release 12.3(4)JA and later, the access point radio is disabled by default, and there is no default SSID. You must create an SSID and enable the radio before the access point will allow wireless associations from other devices. These changes to the default configuration improve the security of newly installed access points. Refer to the Cisco IOS Software Configuration Guide for Cisco Aironet Access Points for instructions on configuring the SSID and the "Enabling the Radio Interfaces" section on page 5-5 for instructions on enabling the radio interface. Cisco Aironet 1100 Series Access Point Hardware Installation Guide 5-4 OL-4309-07