This object is the virtual path identifier (VPI) of the control distribute VCC that broadcasts control messages to all clients on the ELAN, if such a circuit exists. An admin cares because this VPI, together with its companion VCI, identifies the specific ATM virtual circuit carrying control traffic to every LEC, which is useful when cross-referencing switch-side VC statistics with LES-side control traffic. For example, a network engineer tracing why control messages aren't reaching all clients would use this VPI to locate the corresponding circuit in the ATM switch's VC table.