Circuits in the same mesh group act as a virtual multiaccess network, and this value is ignored if ciiCircMeshGroupEnabled is inactive or blocked. This is the numeric group identifier tying multiple circuits together into the flood-reduction meshgroup described above, and it is silently ignored unless ciiCircMeshGroupEnabled is actually set to set(3) on that circuit. For example, assigning mesh group ID 5 to four parallel point-to-point circuits between the same two routers groups them together so an LSP received on one of those four links is not redundantly re-flooded back out the other three.