Description: The iSCSI node index for this member node entry. This index is used to uniquely indicate this table entry, and provides a 1 to 1 mapping to the node name in cIsnsDdMemberIscsiName. The iSCSI node name is too long to be used for an index directly. The iSCSI node index used for a specific iSCSI node name MUST be identical in all DDs and control node registrations, and is persistent across server reinitializations when the iSCSI node is a member of a Discovery Domain (DD) or is registered as a control node. The managed object cIsnsNextIdxUnregIscsiNodeInDd is used to determine an available index when an unregistered iSCSI node is to be added to a Discovery Domain prior to it being registered in the server using the iSNS protocol.