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| 3.6 |  | Implementing Physical Layer Solutions |
| 3.6.3 |  | Solving common problems – Windows, UNIX/Mac OS end-system commands |

On Windows 2000 and XP systems the ipconfig command can be used to establish if a NIC has successfully bound to the required IP address. Sometimes a NIC will not release an old IP address. Using the ipconfig /release command option forces the NIC to release the currently held address. Following with the ipconfig /renew command causes the NIC to attempt to bind to an address supplied by a DHCP server, or to a manually configured IP address.

For UNIX and Mac OS X end-systems the ifconfig –a command can be used to establish if a NIC has bound to the correct IP address.