UPDATE 5/14: Juniper says OpenContrail already has the correlated overlay-underlay visibility that Nuage is talking about. The physical-network information is collected via SNMP and sFlow, which suggests that OpenContrail’s method, like Nuage’s, is applicable to any physical underlay. More info here.
Nuage Networks has announced what it believes is the first software-defined networking (SDN) visibility platform that peers into any type of network underlay.