Renewing DHCP leases for legacy operating systems.
Last revision May 26, 2016
This page describes how to renew a DHCP lease on certain older
operating systems that are no longer supported on the School of
Earth, Energy & Environmental Sciences network.
Please note that older versions of the Microsoft Windows operating
system are not even
allowed
on the Stanford Earth network because they have serious security flaws
that will never be fixed.
Mac OS X versions earlier than 10.5
-
Open the
Network
System Preference Pane.
-
In the
Show:
drop-down menu, make sure that the connection method you are
using is selected, for example,
Built-in Ethernet
for normal wired connections, or
Airport
for wireless.
-
Make sure the
TCP/IP
tab is selected.
-
The
Configure IPv4:
drop-down menu should be set to
Using DHCP.
Fix it if needed.
-
In Mac OS X versions 10.4 and 10.3, there will now be a
Renew DHCP Lease
button below and to the right of the
Configure IPv4:
drop-down menu. Click on that button.
-
Older versions of Mac OS X may not have the
Renew DHCP Lease
button. They may also
have the name
Configure:
for the drop-down menu.
For these older versions, click on the
Apply Now
button on the bottom of the page.
If that button is not available (grayed out), then
first reset the
Configure:
drop-down menu to the
Manually
option and then back again to
Using DHCP.
Now the
Apply Now
button should be available. Click it.
-
After a few seconds, a new IP address should appear.
-
Close the
Network
System Preference Pane.
Mac OS 8 or 9
-
Open the
TCP/IP
control panel.
-
Change the configuration to
Manual Address.
Do not make any other changes.
-
Now change the configuration back to
DHCP.
-
Close the
TCP/IP
control panel.
If you are prompted to save the new configuration, click OK.
Windows NT
-
Open a command prompt window (Select
Run
from the
Start
menu, then type in
cmd
and press the RETURN key).
-
In the command prompt window, type this command
(don't forget to press the RETURN key):
ipconfig /release
-
Now, type this command:
ipconfig /renew
-
Close the command prompt window.
Windows 95, 98, or ME
-
Select Run
from the
Start
menu, then type in
winipcfg
and press the RETURN key).
-
In the
winipcfg
window, click on the
Release all
button.
-
Now click on the
Renew all
button.
-
Close the
winipcfg
window.