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Cannot obtain IP address from DHCP configured in Cisco switch 3750

We have changed our network and have configured DHCP in Cisco 3750 switch. Some of the Vista clients does not get IP now. Message says error occured while renewing interface Local Area Connection. Machine has both NIC as well as Wireless. Tried on both together and separate but no luck. Also tried following things
netsh int ip reset
netsh winsoc reset
adding registry key DhcpConnForceBroadcastFlag and set value to 1
Even in Safe Mode same issue. Any help will be greatly appreciated
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sameerc
Asked:
sameerc
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1 Solution
 
peter41Commented:
Cannot be it blocked by some firewall ?

To diagnose problem, install network sniffer (Network Monitor, Ethereal, Wireshark) on Vista client and look into packets what is happening.

Peter
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CooGuruCommented:
Have you tried this?

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{GUID}
In this registry path, click the (GUID) subkey that corresponds to the network adapter that is connected to the network.
On the Edit menu, point to New, and then click DWORD (32-bit) Value.
In the New Value #1 box, type DhcpConnEnableBcastFlagToggle, and then press ENTER.
Right-click DhcpConnEnableBcastFlagToggle, and then click Modify.
In the Value data box, type 1, and then click OK.
Close Registry Editor.
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sameercAuthor Commented:
Dont think Firewall because it was working fine with previous Win2k3 based DHCP.
DhcpConnEnableBcastFlagToggle is already tried but unfortunately did not do the trick.
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sameercAuthor Commented:
Forgot to mention that if Staic IP assigned, everything works fine. Is it possible that these machines are still looking for old DHCP server for some reason ?
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CooGuruCommented:
It is possible, however, doing what you have already done should have flushed everything out for this.

the problem is in the way that Cisco does it's DHCP Leasing versus the way the Vista asks for the addresses. You have obviously done your research to get to this point, so you have probably already seen all of the articles addressing this.

I will continue to look for other means of forcing the vista Client to pull the addressing in a way compliant with the Cisco Methods
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Jackie ManCommented:
Vista 32 bit of 64 bit?
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Jackie ManCommented:
Do you have any domain group policy which over-ride the local administrator's group policy?
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Jackie ManCommented:
Besides, have you tried the following at the Cisco router?

"disable autonegotiation and locked the switchports to 100 MB Full duplex"

Source: http://social.technet.microsoft.com/Forums/en/winserverNIS/thread/becf4320-f5ce-4b79-9798-b37f122a947d
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sameercAuthor Commented:
Hi Jackie

Its 32 bit. I have a 1GB network so not sure if setting ports to 100MB is advisable. Also issue seems to be getting slighltly more complicated. There are XP machines as well having same problem but randomnly. On the same switch port I tried two different machines. One does and the other does not !!!!!!!! Also same thing happens with Wireless Access Point (Cisco 1200) as well.
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sameercAuthor Commented:
Silly me. Address Pool was empty !!!!!!!!!!!!!!! Should have started with that. Anyways all is well that ends well :))))) Thanks Jackie and CooGuru for responding.
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