High availability features on the QFX3600-I QFabric Interconnect include three fan trays with a 2+1 redundancy model and redundant AC or DC power supplies. The QFX3600-I offers 16 40 Gbps ports, providing data plane connectivity for the QFabric Nodes. Each QFabric Node connects to the QFX3600-I QFabric Interconnect via one to four 40 Gbps interfaces operating over standard OM3/OM4 multimode fiber optic cables. Similar to the fabric inside a modular switch, there are no connections between the QFX3600-I QFabric Interconnects in the data center; the QFabric Interconnect provides transport between QFabric Node devices. Four fully populated QFX3600-I QFabric Interconnects can scale the QFabric architecture to support 768 10GbE customer-facing ports, with an aggregate capacity of 5.12 Tbps and average port-to-port latency of 3 micro-seconds.