There are alternative processes, such as DHCP helpers. This type of function, I don't think, is included with Windows, but network management software (such as Altiris) can manage it. Say computers with "insert-variable-here" will receive IPs in this scope, and computers with "other-variable" will receive IPs from another scope. The variables could be DMI information (from the BIOS), computer name (trimmed) or any other bit of information that the computer can transmit. Or in an extreme case, use one scope for preliminary info and when the server determines what type of interface it is, will reassign an IP from one of the two other scopes. But perhaps a real question is, if both of these types of interfaces are on the same physical network, what is the true purpose of assigning them to different IP ranges? unlickly i don't have any managment software yet. i need something with in the windows envirment to do this if it's possible. the and the reason of diffrent IP range is as i said before one range for voicve and the other for data network.