This read-write InetAddress holds the node's primary IP address, taken from the PNNI Nodal PTSE, which the NMS uses first when trying to manage the switch, falling back to the secondary address in cwtSecIP only if it cannot connect on this one. An admin relies on this field to know the preferred management path the NMS will attempt for a given node. For example, if a node becomes unreachable at the address in cwtPrimIP, the admin expects NMS traffic to automatically fail over to the address recorded in cwtSecIP.