Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1986-2001 Microsoft Corp. C:\WINDOWS>netsh routing ip add scope ?
Usage: add scope [grpaddr=][grpmask=][scopename=]
Parameters:
Tag Value
grpaddr - The multicast scope or group IP address
grpmask - The subnet mask for the multicast scope address
scopename - The name of the multicast scope to be added
Remarks: Adds a multicast scope to the IP routing configuration.
Examples:
add scope 239.1.1.1 255.255.255.224 "My Multicast Scope"