A flexible, customizable and programmable network monitoring platform supporting the concept of On-Demand Monitoring(ODM), that provides to network management functions the ability to gather deep knowledge(i.e. monitoring data) about flow(s)-specific traffic flowing at a given point and time in the network e.g. statistics, traffic shape etc. is pivotal to driving management functions of a self-managing network. ODM is triggered or ad-hoc monitoring that transpires only when needed. A Network Management System (NMS) may require triggering the monitoring of some traffic at some ODM-supporting probes placed in strategic points in the network and demand the creation of a data model(s) reflecting some derived traffic characteristics e.g. statistics, so that the NMS or other systems may query the data model during the period in which monitoring is required for say traffic engineering. This paper introduces On-Demand MIBs as a solution to the requirement of dynamic data model( s) creation and deletion.