The QFX Series includes 3 subseries of switches; the smaller footprints of the QFX5100 and QFX5200 series as well as the larger QFX10000 series.
There are seven models in the QFX5100 subseries. All the models are fixed configuration and 1 RU except for the 2 RU QFX5100-96S. Most QFX5100 models support up to 40G ethernet with both 10G and 40G port configurations. The -48S and -32Q models support up to 100G ethernet. With the variety of form factors many of the 40G Ethernet ports can be configured to be four 10G ports. The QFX5100 series gives flexibility on a compact footprint for all businesses and networks.
The one model in the QFX5200 subseries is a fixed configuration leaf/access switch, that is a great solution on Layer 2, Layer 3 and MPLS networks. QFX5200 switches support up to 32 ports of 100G ethernet or 128 ports of 10G ethernet configurations.