Annotated picture 1 RU switch with uplink ports

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.
This is similar to what Juniper said about the QFX5100 three years ago. Consistency is good.