This read-only value reports an identifier unique to this leaf within the corresponding multipoint circuit, serving as the leaf's own index/handle distinct from any interface or DLCI identifiers. This is the primary key an admin or management system uses to reference a specific leaf when a multipoint circuit has many leaves attached, since interface and DLCI values alone might not be unique across the whole tree. An engineer scripting automated polling of every leaf in a large multipoint video-broadcast circuit would iterate over cktLeafEndpointIndex values to enumerate and individually query each attached leaf.