DHCP not working with MacBook Pro

[kenchie]

Hi -

One of our users on a large college network has an early 2008 MacBook Pro running Lion. The other day the laptop froze, and ever since it has not been able to pick up IP addresses via DHCP, it will only assign itself a 169.254 range address. The problem exists on both ethernet & wi-fi. I have tried the following without success;

Removed proxy entries/PASV mode
New Location
Different user account
Trashed the 'SystemConfiguration' folder
Removed all college entries from keychain
Installed USB ethernet adapter
Reset PRAM

The ethernet cable and wallport it is connected to work fine with other PCs.
I am running out of ideas - any suggestions please?

Thanks.

 

[Bruno09]

Hi,

you have tried all that must be done in such a case.

You might add : use Disk Utility to "Check the disk" and "Repair the permissions".

If no success, reinstall the system (without wiping the disk).
Cmd + r on boot (OS X Recovery).

 

[simonsi]

...since it has not been able to pick up IP addresses via DHCP...

What happens if you assign it an ip address, gateway and DNS manually?

How long is the lease assigned by the network? - it might be seeing the laptop as a duplicate ip address and blocking it - What was done to unfreeze the laptop?

----------

you have tried all that must be done in such a case.

No he hasn't.

 

[ajbudis]

Go into system preferences -> network and create a new location and make sure to hit apply after creation.