Installation Instructions

Chapter 9: QSFP28
This chapter provides installation procedures and specifications for 100 Gigabit Ethernet Quad
Small Form Factor Pluggable 28 (QSFP28) transceiver modules.
Important:
• The VSP switches allow the use of QSFP28 transceivers from any vendor. Extreme
Networks does not provide support for operational issues related to QSFP28 transceivers
that are not listed in this document as supported transceivers. The switch logs the device
as an unsupported or unknown device.
• Extreme Networks recommends using the QSFP28 transceivers documented in this
document as they have been through extensive qualification and testing. Extreme
Networks is not responsible for issues related to third party QSFP28 transceivers.
QSFP28 transceivers
This section describes how to select, install, and remove Quad (4-channel) Small Form Factor
Pluggable 28 (QSFP28) transceiver modules.
Use a QSFP 28 transceiver for 100 Gigabit per second (Gbps) Ethernet connections over optical
fiber. Alternatively, you can use a direct attach cable (QSFP28 to QSFP28 DAC) to connect ports for
cable distances of up to 5 meters.
Note:
QSFP28 transceivers and DACs are supported on 100 Gigabit Ethernet QSFP28 ports only.
Selecting a QSFP28
Use a QSFP28 transceiver to interface a port to a fiber optic cable.
Depending on the product, you can obtain transceivers for cable distances of up to 10 km (for LR4
transceivers). QSFP28 to QSFP28 100 Gigabit passive copper direct attach cables (DAC) have a
reach of up to 5 meters. QSFP28 to QSFP28 100 Gigabit active optical cables have a reach of 10
meters.
May 2018 Installing Transceivers and Optical Components on VOSS 63