[1] Its goal is to simplify the traditional tree architecture of L2/L3 switches to a single tier any-to-any connectivity.
Competing technologies to QFabric include IEEE 802.1aq, MC-LAG, VXLAN, FabricPath, Virtual Cluster Switching (VCS), and the IETF TRILL standard.
[2] QFabric System Components consists of: For data center architecture, QFabric creates a single logical switch that connects the entire data center rather than tiers of multiple access aggregation and core switches.
The reason why this can improve performance is that, instead of going through multiple tiers of switches in a traditional network, packets only get through the infrastructure in a single hop, so this can reduce the delay significantly.
In QFX3000-G QFabric System, although it supports up to 6,144 10GbE ports, by connecting all nodes in a full-mesh topology, it can achieve an average port-to-port latency of 5 microseconds.