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Network DHCP Configuration

Ethernet Configuration for Windows Vista/7

1. Be sure you are logged into the computer as an administrator.
2. Click on the Start Bubble.
3. Click on CONTROL PANEL.
4. Click on NETWORK AND SHARING CENTER.
5. In the left column click on MANAGE NETWORK CONNECTIONS.
6. Right click on LOCAL AREA CONNECTIONS and select PROPERTIES.
7. On the GENERAL tab, double-click INTERNET PROTOCOL (TCP/IP) or highlight it and select properties.
8. Select the GENERAL Tab of the Internet Protocol (TCP/IP) Properties window.
9. Make sure the radio buttons for Obtain an IP Address Automatically and Obtain DNS Server Address Automatically are both selected and click OK.  

Ethernet Configuration for Windows XP

1. Be sure you are logged into the computer as an administrator.
2. Close all applications
3. Click START and then CONTROL PANEL.
4. Click NETWORK AND INTERNET CONNECTIONS.
5. Click NETWORK CONNECTION.
6. Double-click the LOCAL AREA CONNECTION icon.
7. The Local Area Connection status window will appear.
8. Click on PROPERTIES.
9. On the GENERAL tab, double-click INTERNET PROTOCOL (TCP/IP) or highlight it and select properties.
10. Select the GENERAL Tab of the Internet Protocol (TCP/IP) Properties window.
11. Make sure the radio buttons for Obtain an IP Address Automatically and Obtain DNS Server Address Automatically are both selected and click OK.  

Ethernet configuration for Mac OS X 

Acquiring a new/clean copy of the TCP/IP Preferences folder (optional)

The procedure involves removing the TCP/IP Preferences folder.  If you wish to keep a copy of the old TCP/IP preferences, you should copy them to another folder other than the Preferences folder or to a disk.

1. Close all windows.
2. Click on the MACINTOSH HARD DRIVE.
3. Browse to the SYSTEM FOLDER and to PREFERENCES.
4. Find the TCP/IP PREFERENCES and drag them to the trash.
5. Close all windows.
6. When the TCP/IP settings are open again, a new preferences folder is automatically created.

Configure new TCP/IP settings.

1. Click on the Apple Menu
2. Click SYSTEM PREFERENCES
3. Select the NETWORK icon.
4. In the Network window, set LOCATION field to automatic.
5. The SHOW field should be set to Built-in Ethernet.
6. The CONFIGURE field should be set to Using DHCP (Do not use DHCP with fixed IP address).
7. The DHCP Client ID field should be blank.
8. Everything else should be blank.
9. Save changes and close window.

If you do not see Built-In Ethernet in the show field

1. Select Active Network Ports from the show field.
2. Select Built-in Ethernet.
3. Click Apply Now
4. If Built-in Ethernet is not in window, select New.
5. A drop-down menu will appear.
6. From the drop-down list, select Built-in Ethernet.
7. Click OK.