Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1986-2001 Microsoft Corp. C:\WINDOWS>netsh routing ip ospf add area ?
Usage: add area [areaid=]
Parameters:
Tag Value
areaid - The IP address of the area to add.
Remarks: Adds an ID for the area. This is a 32-bit number expressed in dotted
decimal notation that identifies the OSPF area. The area ID does not need to
coincide with an IP address or IP network ID. The area ID of 0.0.0.0 is
reserved for the backbone. If the area represents a subnetted network, you
can use the IP network number of the subnetted network for the area ID.
Examples:
add area 11.1.1.2