Cisco WAP351 Quick Start Manual page 9

If it fails, you should get a reply similar to the following:
Pinging 192.0.2.10 with 32 bytes of data:
Request timed out.
Possible Cause of Installation Failure
Devices Cannot Connect Using Wi-Fi
Complete the Setup Wizard. The Wi-Fi radio on the Cisco WAP351 is
turned off by default, and the Setup Wizard activates it. For users who do
not want to use the Setup Wizard, log into the Cisco WAP351 using a
Category 5e Ethernet cable, and activate the Wi-Fi radio manually. See the
Administration Guide for details on activating the Wi-Fi radio.
No Power
Power up the switch and your computer if they are turned off.
Make sure that your PoE switch is powered on and the lights indicate that
you have a link. See "Verifying the Hardware Installation".
Verify that the devices on your network are not plugged into a switchable
outlet.
Bad Ethernet Connection
Check the state of the indicator lights. See "Verifying the Hardware
Installation".
Check the Ethernet cable to ensure that it is firmly connected to your
devices. Devices connected by the Ethernet cable can include the WAP
devices, and routers, any switches, and your computer.
Verify the connected switch has auto-negotiation enabled. The Cisco
WAP351 and the switch need the same negotiation parameters set.
Bad Image
After a new firmware installation, if the POWER light is solid red, which
indicates that the device fails to boot with both firmware images, contact
system support; see "Where to Go From Here".
Incorrect IP Address
The most likely cause of connectivity failure is an incorrect IP address. The
Web browser may be pointing to the wrong IP address, or your computer
may be configured with an IP address that is not in the same subnet as the
Cisco WAP351.
Cisco WAP351 Quick Start Guide 9