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Troubleshooting wireless connectivity: Step 3

25 Sep 2006 | SearchNetworking.com

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Using the wireless router's admin interface, verify that the router's LAN port is active, noting its IP address and subnet. Make sure that DHCP is enabled and check that the DHCP address range is in the same subnet as (but does not overlap) the router's LAN port address. If the router's DHCP server filters on MAC address, add the wireless adapter to that "permitted device" list. Check the router's log or DHCP status page to verify that an IP address is indeed assigned to the wireless adapter whenever you connect.

Troubleshooting wireless connectivity

Step 1: Recheck physical connections
Step 2: Verify wireless adapter connection
Step 3: Verify router's LAN port activity
Step 4: Check wireless adapter's IP address
Step 5: Verify reachability
Step 6: Check firewall connection
Step 7: Verify that the adapter is associating with the wireless router
Step 8: Find and fix a wireless security parameter mismatch
Step 9: Debug 802.1X
Step 10: Fix an 802.1X EAP mismatch or credential problem
Step 11: RF interference and roaming

About the author
Lisa Phifer is vice president of Core Competence Inc., a consulting firm specializing in network security and management technology. Lisa has been involved in the design, implementation and evaluation of data communications, internetworking, security and network management products for nearly 20 years. She teaches about wireless LANs and virtual private networking at industry conferences and has written extensively about network infrastructure and security technologies for numerous publications. She is also a site expert to SearchMobileComputing.com and SearchNetworking.com.

This tip originally appeared on SearchNetworking.com.

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