Windows 2000 Re-New Dynamic IP-address

by Johannes Helmig [Published on 18 Feb. 2001 / Last Updated on 18 Feb. 2001]

When using TCP/IP-addresses assigned by a DHCP-server, there is sometimes the need to
request a new / different IP-address (example: a notebook connected to a different network).

First, check the current dynamic assigned IP-address using either IPCONFIG in a
Command-Prompt windows ( you can also use the Microsoft utility "wntipcfg" available as download
from the Microsoft website ) :

example :
Windows 2000 IP Configuration
Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . . . . :
Subnet Mask . . . . . . . . . . . . . .:
Default Gateway . . . . . . . . . . . . :

or in "Computer Management" under
"System Tools" / "System Information" /"Components" /"Network" / "Adapter" :

If there is a new to request a new IP-address:
There is no utility with a Windows GUI ( like the Windows95/98 "winipcfg" )

The Window2000 Help shows on the tab "Index", keyword "DHCP" the usage of IPCONFIG
to renew an IP-address:

"/renew [adapter]"
Renews DHCP configuration parameters. This option is available only on systems running the DHCP Client service.
To specify an adapter name, type the adapter name that appears when you use ipconfig without parameters.

You need to open a Command-Prompt windows and enter: ipconfig /renew :

Luckily there is only a limited need to run this command manually, since a Windows2000 system
keeps monitoring the network for a DHCP-server and will use it.
( for example: my Windows2000 system had booted using the IP-Autoconfiguration, using
an 169.254.x.x IP-address, but when I then started up an NT4-server with DHCP-server,
it used the DHCP-server to request an IP-address without any action from myself ).

See Also

The Author — Johannes Helmig

Dr.Johannes Helmig is working as Director, Technical Knowledge Management in the Belgium office of Gerber Technology where he is involved in Customer Service and internal training, with special interest in Networking.


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