The edge switch, QFX3500, can also be used as a standalone top-of-rack switch. The interconnect chassis architecture is a Fat Clos tree, which acts as a forwarding plane for data traffic, and the edge switch acts like a blade in a larger chassis that performs all the forwarding lookups, traffic classification, and backbone encapsulation functions. The Juniper model number for Qfabric is QFX3000-G it consists of an edge switch (analogous to an access layer switch), an interconnect chassis (analogous to a core switch), and a fabric manager (analogous to a network controller). The main advantages of this approach include creating a single, very large network fabric with relatively low latency between any two edge ports. For this reason, Qfabric devices are not referred to as edge or core switches, and the overall approach is called a fabric rather than a network. Qfabric allows multiple distributed physical devices in the network to share a common control plane and a separate, common management plane, thereby behaving as if they were a single large switch entity. Juniper Networks produces switches using a proprietary multipath Layer 2/3 architecture and encapsulation protocol called Qfabric. Casimer DeCusatis, in Handbook of Fiber Optic Data Communication (Fourth Edition), 2013 13.5 Juniper Qfabric

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