3Com 8760 User Guide - Page 256

CHAPTER 6: TROUBLESHOOTING Symptom Solutions Verify the access point configuration. No operation. Review access point firmware revisions and update firmware if necessary. Make sure that there are no duplicate IP addresses on the network. Unplug the access point and ping the assigned address to make sure that no other device responds to that address. Confirm that the service area on the access point matches that on the clients. Access point powers up, but does not associate with wireless clients. Verify that the clients are operating correctly. Make sure that security settings on the access point match those on the clients. Make sure that the access point antennas are positioned properly. Check the range and move clients closer if necessary. Mobile users do not have roaming access to the access point. Make sure that all access points and wireless devices in the ESS in which mobile users can roam are configured to the same WEP setting, SSID, and authentication settings. Try changing the wireless channel on the access point. Check the access point antennas, connectors, and Slow or erratic performance. cabling for loose connections. Check the wired network topology and configuration for malfunctions. Running on a computer connected to the wired LAN, the 3Com Device Manager cannot find an access point. The 3Com Device Manager cannot discover devices across routers. Make sure that the computer is connected on the same segment as the access point. After you specify an IP address for an access point, the 3Com Device Manager continues to point to the old IP address when you select the access point in the Wireless Network Tree. In the 3Com Device Manager window click the Refresh button to refresh the Wireless Network Tree. Then click the access point in the Wireless Network Tree and click Properties. The IP address you specified is now listed. If you want to continue configuring the access point, click Configure. 6-2