lost shared networking with 10.5.2/XP PRO
Okay, like several others, I lost shared networking connectivity after applying 10.5.2. OSX updates.  I could change Parallels to use the airport ethernet connection and that would work just fine, but on occasion, I use a Verizon AirCard on my MBP and I only get a SINGLE IP address, so I really needed shared networking.
I read all the suggestions from this thread and none fixed the problem.  I then noted that in OSX, system preferences, network that the Parallels NAT adapter had a strange status.  Rather than indicating "connected" as I expected, it was indicated that it had a "self assigned IP address" and might not be able to connect.  I knew that looked suspect.  I tried turning off IPv4 config, then an apply, then turn it back to USE DHCP, then an apply, but that resulted in the same weird status.  
I then went into Parallels Preferences, Network and turned off DHCP scope.  I shutdown windoz and quit Parallels and then restarted Parallels, reboot of windoz.  At first nothing changed, but then I remembered to go back into OSX Preferences, Network and check the Parallels NAT adapter.  I set IPv4 config to off, then applied, then turned it back to USE DHCP, then another apply.  This time, BINGO.  The Parallels NAT adapter pulled a valid IP address from the range allowed within the Parallels Preference, Network settings.  I then verified that windoz was now working in shared and sure enough it was working.  Just to be sure, I have completely shutdown XP, Parallels, and OSX and did a complete reboot and shared networking is still working.  
So, it looks like that after 10.5.2. updates were applied, something happened that broke Parallels NAT adapter's ability to pull a valid IP address.  Turning off DHCP scope in Parallels, Preference, Network, then a shutdown of Parallels, then a relaunch of Parallels , turning back on Parallels, Preference, Network DHCP Scope, then a relaunch of windoz fixed the problem.
3/27/08:  Just an update to confirm that I have not had any additional issues with shared networking.  Over the past few days, I have rebooted XP and OSX several times with no ill effects.
david
					 
				
			
			
			
		 
		
		
		
			
			
				Last edited: Mar 27, 2008