DHCP Client Behavior - Microsoft Enterprise Networking Team - Site Home - TechNet Blogs: "A registry key to control this is: AutonetRetries which may be placed as a DWORD in:
AutonetRetries controls the: 'DEBUG_LEASE 0430.0910::10/14/2008-20:59:41.244 (ReObtainInitialParameters:protocol_c3191)Sleeping for 275 seconds' time period
Thus if the registry is set to 30 (decimal) for example, then the sleep time is reduced to 30 seconds. This means that the set of 4 tries will be sent out every 30 seconds.
Also another interesting reference is:
KB 928233 – Windows Vista cannot obtain an IP address from certain routers or from certain non-Microsoft DHCP servers
Another registry key suggested here is DhcpConnEnableBcastFlagToggle
Though the purpose of this registry is completely different, on closer inspection, this setting has a side effect in Windows Vista where it sends out 2 sets of DISCOVER packet sets like Windows XP, albeit one set with and the second set without the Broadcast flag. Subsequent sets will be controlled by the AutonetRetries setting (300 seconds by default)."