A Table of MAC addresses of active nodes, which are detected to be connected to the concentrator. These nodes may be directly connected to the concentrator or may be indirectly connected via an interconnect port, bridge or switch. The definition of active node is provided by s5CmSNodeStatus. The object s5CmSNodeIfIndex specifies the source that is used to detect MAC addresses. When the source is not an interface, the agent uses best effort to detect entries. These entries may, but are not required to be, MACs from media types other than the interfaces for the agent. This table is indexed by source of the detection and MAC address of the node. This table is indexed differently from the ShowNodes table which uses the source of the detection, board, port, and MAC address of the node. Note: The same MAC may be detected at several locations. The entry in this table is the last detected location. In addition, more than one MAC address could appear on the same board and port.