Cisco Cisco AP541N Wireless Access Point 관리 매뉴얼

Troubleshooting Your Connection

Cisco AP 541N Dual-band Single-radio Access Point Quick Start Guide

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If you cannot display the login window, you can test the IP address by using the 
ping command. If you do not know the IP address, you can configure the device by 
resetting the device to the factory defaults and accessing the Access Point 
Configuration Utility by using the factory default static IP address.

If you cannot display the configuration utility, you can test the ability of the PC to 
communicate with the access point by using ping. To use ping on a PC running 
Windows:

Verify that the Cisco AP 541N is powered on and the LEDs indicate the 
appropriate links.

Open a command window by using Start > Run and enter cmd.

At the Command window prompt enter ping and the 

address. For example ping 192.168.10.10 (the default static IP address of the 
access point).

If successful, you should get a reply similar to the following:

Pinging 192.168.10.10 with 32 bytes of data:
Reply from 192.168.10.10: bytes=32 time<1ms TTL=128
Reply from 192.168.10.10: bytes=32 time<1ms TTL=128
Reply from 192.168.10.10: bytes=32 time<1ms TTL=128

If it fails, likely you are using the wrong access point IP address and you will get a 
reply similar to the following:

Pinging 192.168.10.10 with 32 bytes of data:
Request timed out.

The most likely cause of connectivity failure is an incorrect IP address.

The Web browser is pointed to the wrong IP address. Or, your PC might be 
configured with an IP address that is not in the same subnet as the access point.