Which two NetApp features enable an administrator to limit the number of paths that a...

Selective LUN Mapping (SLM) and portsets are ONTAP mechanisms specifically used to control the number of paths visible between hosts and mapped LUNs. SLM automatically limits LUN access to paths through the node that owns the LUN and its HA partner, reducing unnecessary paths in larger clusters. A portset provides additional restriction by defining exactly which FCP or iSCSI LIFs an igroup can use to reach its mapped LUNs. NetApp notes that portsets can be combined with SLM when further path restriction is required. ALUA identifies optimized and non-optimized paths but does not itself reduce the number of visible paths. An igroup controls which initiators can access a LUN but does not independently restrict target LIF visibility. Relevant topics include SLM, portsets, igroups, SAN multipathing, and path-count optimization.