This read-write INTEGER, though its source description is empty, is the cost value assigned to a mesh network connection, feeding into path-selection decisions the same way stRootCost does for LAN spanning tree links. An administrator raises or lowers it to make a WAN backup path more or less preferred relative to alternatives. For example, the admin increases meshCost on a slow dial-backup mesh link so it is only used when the primary LAN path becomes unavailable.