This read-create integer identifies which mesh group this circuit belongs to, and circuits sharing the same value act as a single virtual multiaccess network so an LSP flooded in on one member is not re-flooded out another member of that group; the value is ignored if csIsisCircMeshGroupEnabled is not set to enable mesh grouping. An administrator building a hub-and-spoke or full-mesh MPLS or ATM core would assign the same csIsisCircMeshGroup number to every circuit connecting a given set of routers to eliminate redundant flooding across the mesh. For example, setting csIsisCircMeshGroup to 100 on three parallel PVCs between the same pair of core routers groups them so LSPs traverse the mesh only once.