Hi everyone just got my hands on Windows Vista. It is pretty cool running on my Fujitsu T4215 Core 2 Duo notebook. I like the nice aero interface... but woe and behold there are issues with the IP networking. It seems there are some changes in the way Windows handles DHCP. This results in incompatibility with some routers and network configurations. You will not be able to get an IP address or be able to access the internet though you are connected on the network. But Fret not I have some registry settings that might just help. read on......

Add this registry settings into HKey Class Local Machine.

 The GUID represents the GUID of the network interface card in your computer.

WARNING: Only apply this patch if you are having problems do not apply it to all your network interfaces. 

Registry Tweaks for Vista DHCP Problems

HKLM\SYSTEM\CURRENTCONTROLSET\SERVICES\TCPIP\PARAMETERS\INTERFACES\{GUID}

Change
DhcpConnForceBroadcastFlag = 0

ADD DWORD
DhcpConnDisableBcastFlagToggle = 1

Also to disable IP V6

HKLM\SYSTEM\CURRENTCONTROLSET\SERVICES\TCPIP6\PARAMETERS\

ADD DWORD
DisabledComponents = FF (hex)

UPDATE:

If you find editing the registry a drag, try out this small tool I written. Download it HERE

Comments (33)

	1. 14-05-2009 11:25
	ford advantage motorola i 9 phone wont connect to lap top with vista h.p.virsion 6.0 wont provide comm port http://peoples pc Guest Report

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	2. 05-01-2009 05:59
	xp and vista hi.. i have a hp laptop with vista on it and its running fine with my wireless network at home then i buy an acer with windows xp.. but it doesn't connect to the internet to my cable and in the wireless router.. how can i access it ? please reply Guest Report

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	3. 23-12-2008 02:06
	Pete DHCP issues following auto update microsoft, only access internet with manula IP addresses:   Followed your advice and changed the below in HKLM\SYSTEM\CURRENTCONTROLSET\SERVICES\TCPIP6\PARAMETERS\    {1A6FC3F4-72C0-40E9-A2D6-5C11D6C1FDBB}  {1B757D82-BFDA-43EF-8D49-8FAB19BAE907}  {8595e907-0c99-4dd2-9b9d-36d150b7433b}  I added the fix to the above but not sure what this (GUID) means so i applied to all above. is this right? Also did the disable you mentioned.  Still cannot start DHCP??? Guest Report

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	4. 04-12-2008 19:30
	HELP DHCP: No--Cant connect I am using a vista PC for a month via wireless. I hardwire it, and it now doesnt work.    DHCP is set to NO    How do I fix this    Thanks Guest Report

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	5. 15-11-2008 22:41
	vista router problem Hi,i have vista home premium,and when i connect directly to modem iam able to access internet, but when i go through a router,i cant access internet,but skype messenger does log in and i can do voice chat and everything.  i do ipconfig and i have an ip address assigned by the router.  so i don't know wheres the problem, is it the router or vista settings?technically if i dont have internet then even skype shouldn't log in.  please help me. Guest Report

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	6. 06-10-2008 03:03
	It Worked!!! I've been having intermittant DHCP problems with my Netgear DG834N ever since downloading an Windows Update for Vista some months ago. The problem only occurred when security was turned on (ie all the time!!).  These 2 registry tweaks finally fixed it. Woo Hoo!! Guest Report

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	7. 03-09-2008 15:49
	It works!!!!! No 26 comments - mostly works  However I had ADD WORD DchgpConnEnableBcastFlagToggle=1 http://www.yurtvillage.co.uk Guest Report

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	8. 08-08-2008 20:45
	Vista dhcp finally solved - thanks... Hi,  After several hours of looking a trying different things the combination of these two reistry changes solved the problem. The MS-article on the subject does not mention doing the initial 'change' to:    DhcpConnForceBroadcastFlag = 0    So - when this is changed and the other entry added - BINGO!    Many thanks...    Dave  PS: In summary - For me - all that was needed where the changes below...    Registry Tweaks for Vista DHCP Problems    HKLM\SYSTEM\CURRENTCONTROLSET\SERVICES\TCPIP\PARAMETERS\INTE RFACES\{GUID}    Change  DhcpConnForceBroadcastFlag = 0    ADD DWORD  DhcpConnDisableBcastFlagToggle = 1    Guest Report

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	9. 08-08-2008 02:01
	tool I am logged on as an administrator but the tool didn't work. Guest Report

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	10. 06-08-2008 06:56
	Thanks a lot ! Your little proggy (seems to be .net written) throws an exception after clicking on Query adapters. Nevertheless, after clicking on continue it still works and solved all of my DHCP issues !  Now ipconfig /release works, and so does ipconfig /renew and so does my Wireless also work after hibernating !    Great ! Guest Report

Geoffrey

	11. 30-07-2008 23:24
	Thanks a lot ! Vista connects to the internet straight through the modem but when i hook up to router there is no connection.when connected to modem it comes up as local area connection and works when hooked to router it comes up as local connection without internet have any idea as to what might be Guest Report

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	12. 30-07-2008 18:08
	a couple of other things to chec another website indicated that making your network private or public (which only affects WinVista Firewall) can make the difference -- set to private. see http://help.lockergnome.com/vista/DOA-Unidentified-Network-Access-Local-ftopict22152.html . My problem stemmed from an outdated version of PC Anywhere that I just installed (version 11); I had to do a system restore to the setting prior to installing that software. Guest Report

Rick in Insurance

	13. 21-07-2008 12:10
	Great, thank you. Hi thank you for this fix, works like a dream. Guest Report

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	14. 19-07-2008 19:36
	Great, thank you. Hey Body you ROCK...    I was really going made with my sony vaio laptop to connect to the internet using wireless home and at work...    Now your suggestion solve the problem....    Thanks A TON... DUDE Guest Report

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	15. 09-07-2008 01:00
	Great, thank you. Thank you for this solution. Manually made the changes and it worked. YHou rock!!!!!    If it does not work for you, try rebooting after making changes. Guest Report

Oddface

	16. 30-06-2008 20:32
	Help needed Hi  I'd try the adive above if I knew what it all meant. We have windows XP devices tthat talk wirelessly to our router but ournew laptop with vista sees the wireless network but will not seem to talk to it.  Help...... in plain simple to understand words to someone who is not IT literate and starts to lose the plot after the word IP address is mentioned Guest Report

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	17. 04-05-2008 03:35
	Help needed Hi I tried all their suggestions and still not working, including static IP, I connect the wireless but not enter the Internet. What can I do? Guest Report

Bruno

	18. 22-03-2008 10:26
	the tool works wonderfull thanks a lot for the tool, i have rectified the problem on lot of vista notebooks for my customers using this tool.  thanks again buddy Guest Report

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	19. 20-03-2008 17:53
	DHCP Vista Issue I am also facing the same kind of problem. When I try to connect to wireless network it stalls at "awaiting for IP configuration". I am using thinkpad R61 with Vista. Guest Report

Boney

	20. 10-03-2008 00:46
	David When applying your auto fix is it to the Local Area connection or Loopback Pseudo-Interface 1?    Thank you! http://www.clixportraitstudios.com Guest Report

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	21. 18-01-2008 03:43
	David the tcp regedit worked great for me...i never did disable tcpip6 and havent had any issues...thanks Guest Report

kboe

	22. 09-01-2008 21:50
	David Thank you very much. It worked.  But only after I got the correct GUID of my Wifi Card   *Tip, put a static IP on that nonworking card, so you can find it easier while browsing the different GUIDs* Guest Report

Guest

	23. 05-01-2008 08:18
	Still doesn't work I tried all of what you suggested and I am still not able to connect. I am using a wireless card. The funny thing is I could connect fine a few hours before and have been using that computer without problems for quite some time. It just suddenly stopped working. Guest Report

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	24. 13-12-2007 21:02
	it helped!!!! Thank you,    I just got the first vista pc in my hands and it didn't work, but now it does.  Thanks to you. Guest Report

Steven De Schouwer

	25. 26-11-2007 02:25
	Update for people with wireless problems Hi readers I feel your pain... apparently there is a wireless solution that might work.. those with wireless problems might want to add this..  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\P arameters and add a new REG_DWORD named ArpRetryCount with a value of 0. http://www.reviewingit.com Guest Report

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	26. 19-11-2007 14:49
	50% lucky; 50% @#$% Vista and DHCP, a match made in hell or heaven?  Anyway, my HP NX7400 laptop had issues on both network cards. Wireless and wired. After putting your changes in the Registry the wired one works fine!!! But the wireless still does not get a IP-address form the DHCP-server. Bummer!!  Any other tips??  Regards Mark http://www.dyzle.com Guest Report

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	27. 07-11-2007 16:02
	frank This solution did not work for me. In ipconfig/all I get 2 default gateways the first one is 0.0.0.0 and I can not get rid of it. In Route Print under the Gateway heading all listings are "On-Link". I have 2 systems down this AM after running for a month. My Win2000 system works fine    http://www.xanadu.ca Guest Report

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	28. 29-10-2007 02:50
	frank Hi Thorox,    I goofed, its a typo my fault... I think using a tool to do the changes would be better so I wrote a proggy to do the changes. Guest Report

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	29. 17-10-2007 19:09
	frank 4. In the New Value #1 box, type DhcpConnEnableBcastFlagToggle, and then press ENTER.      Why are you using a different flag? Guest Report

Thorox

	30. 10-09-2007 20:54
	DHCP Vista Issue My Thinkpad T60,upgraded to Vista, with newest drivers from Lenovo, even after described register correction, doesn´t work with DHCP.It is Vista issue,because former XP installation works still perfect,replaced HD with new Ultimate installation with the same hardware, three different nets used, three different routers,all the same problem, XP DHCP handshake works, Vista doesn´t.Only static IP configuration helps. Guest Report

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	31. 08-08-2007 03:13
	Tip for didntwork Hi didntwork,    Do you have a spare xp computer to see if DHCP works with the xp computer. Or even a router with DHCP support to make sure that the problem is just Vista. If the other devices connect it seems like the problem is the Vista computer. If it is just a DHCP issue you can try using a static IP that was given to the devices you tested that worked... Can't think of a better solution now... Hope this helps you... Guest Report

Johnathan

	32. 05-08-2007 19:25
	didntworkforme The above solution didnt work for me. My Vista Home premium still doesnt connect to the internet. I have a cable modem connection to internet Guest Report

didntwork

	33. 05-07-2007 16:39
	vista dhcp solved! thanks hey buddy! thanks, this is the only solution on the interent that actually works, even microsofts solution to the prob doesnt work. thanks a lot. Guest Report

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