Did you reinstall the Java update as well? According to Pulse troubleshooting, some errors are associated with Java.

Did you only install Pulse on this one machine and not the others? So would this be the only difference between the ibook and the other machine?

The iBook was the only machine I installed Pulse.

I have removd it and put the iBook asleep, and everything continued to work correctly. Will update after some more tests!

Removing Pulse has appeared to solve the problem. I have moved in and out of a couple of wifi networks, as well as put the iBook to sleep, etc. Nothing has caused it to go back to self assigning the IP address!

Thanks for all your help!!!!

I'm having a similar issue with my MacBook Pro and Linksys WRT54G router. My computer would properly connect to the router when I restarted or woke from sleep, but it would lose the internet connection periodically. After turning Airport off and on, I'd get the self-assigned IP address

I tried numerous things including reinstalling the OS, turning off the firewall, changing wireless channels, changing the router IP address, etc. I downloaded iStumbler and I do see another network that may be causing some issues.

The solution was to have the MBPro assign it's IP address manually. This is done under the Network System Preference. Go to AirPort and click on the TCP/IP tab. Select "Manually" under "Configure IPv4".

Select an IP address in the range specified by your wireless router. For my Linksys WRT54G, the default is in the range of 192.168.1.100 to 192.168.1.149.

The "Subnet Mask" is listed under the "Basic Setup" on my router.

Router is the IP address for the wireless router, default for my WRT54G is 192.168.1.1

Here's the key that got this to work:

My router has a place to enter "Static DNS 1" & "Static DNS 2". These are listed on the router's "Status" page under "Internet". Enter these first on the router's "Basic Setup" page, then in the computer's Network System Preference under "DNS Servers".

With these addresses entered, it works well. I've tested by turning the router on & off, restarting the computer, etc.

FWIW, I have a DSL modem through AT&T. The router is set up as "PPoE" under "Internet Connection Type".

Anyway, the issue seems to be solved for the moment and I wanted to share in case anyone else might come across something similar.

-murray

Airport IP problem also
 

I am having the same problem as the others. I have noticed that the subnet mask drops off the 3rd 255, and then I loose my connection