A reliable network topology representation is the fundamental prerequisite for efficient root-cause analysis, capacity planning or automation. Our discovery algorithms deliver a multi-layer modelling of the network, regardless of vendors or technology. Simply navigate top-down through the model to visualize the real underlying route of a high-end service (i.e. RAN 4G site) across the transport network. Browse the model bottom-up to identify the upper-layer services (i.e. 802.1Q VLAN, Gigabit Ethernet, IP/MPLS Tunnels, etc) potentially impacted by a fiber-cut or a link outage.