Introduced: 31 January 2017

There is also an all-QSFP model of this switch not shown here but described in the data sheet.

What Juniper says about buffering

Intelligent Buffer Management—The QFX5110 switches have a total of 16 MB shared buffers. While 25% of the total buffer space is dedicated, the rest is shared among all ports and is user configurable. The intelligent buffer mechanism in the QFX5110 effectively absorbs traffic bursts while providing deterministic performance, significantly increasing performance over static allocation.