H3C Technologies H3C S12500-X Series Switches - Manual (Page 61)

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3. Enable the network adapter or connect the network cable, release the IP address, and obtain
another one on the client. For example, to release the IP address and obtain another one on a
Windows XP DHCP client:
a. In Windows environment, execute the cmd command to enter the DOS environment.
b. Enter ipconfig /release to relinquish the IP address.
c. Enter ipconfig /renew to obtain another IP address.