Library /sys$common/syshlp/ncphelp.hlb CONNECT, VIA, PHYSICAL ADDRESS p-address  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Specifies the physical address of the target node.  The value is the
 physical address that the target node has set for itself or, if the
 target node has not set a physical address, the hardware address
 associated with the target node's device controller.  This parameter
 is required.