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Troubleshooting LAN Connectivity

Last Updated: Mon, 21 Nov 2016 > Related Articles

Summary

Sometimes the broadband router is able to obtain a public IP address, but none of the computers can connect. When this happens, you have a LAN connectivity issue.

Solution

Follow these steps to troubleshoot a LAN connectivity issue.

1

In the order listed below, power cycle your network.
 
Important: The order in which this is done is relevant and crucial to success.
 

  1. Turn everything off. Start with the computer(s), then the router, then the cable modem.
  2. Leave everything off for 30 seconds.
  3. Turn everything on. Start with the cable modem and allow the modem to get in sync.
  4. Turn on the router.
  5. Turn on the primary computer and finally turn on the remaining computer(s).
2

Verify the router is set-up as a DHCP server.

3

Verify that all the wireless router settings related to SSID, WEP and MAC level authentication are correct.
 
Important: If a network includes a Windows XP computer using a wireless connection, do not disable the SSID Broadcast feature on the router. Disabling SSID can cause a loss of wireless connectivity to Windows XP. Verify the WEP and MAC address filtering security features are enabled.

4

On the wireless router, change channels.

5

Attempt a hard reset.

6

If there is still no connectivity, contact the router manufacturer.


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