If you want to use the z/OS NFS Network Status Monitor (z/OS NFS NSM) and the z/OS NFS Network Lock Manager (z/OS NFS NLM), you must specify the NLM site attribute for the z/OS NFS server. See Table 1 for details. If you specify the NLM site attribute, NLM and NSM will start when the NFS server is started, and will stop when the NFS server is stopped. The attribute's default value, NONLM, specifies that the NFS server will run without NLM or NSM.

After a z/OS NFS server restart, the z/OS NFS server sends an SM_NOTIFY request to each NFS client that supports NLM. The NFS client should reclaim locks as soon as it receives the SM_NOTIFY request.