Juniper QFX Series Hardware Guide

The following system modes are available on the QFX5110-32Q:
•
Default mode (from Junos OS Release 17.2R1 up to Junos OS Release 18.1R1)
All 32 QSFP+ and QSFP28 ports on the switch are configured for 40-Gigabit Ethernet
only. All ports are supported as access or uplink ports, but cannot be channelized.
•
Default mode (Junos OS 18.1R1 and later)
All 32 ports are supported as access or uplink ports and configured for 40-Gigabit
Ethernet. When ports 0 through 23 are configured for 40-Gigabit Ethernet and a 4x10G
breakout cable is detected, the system converts the port into 4 independent 10-Gigabit
Ethernet ports. When a 100-Gbps transceiver is inserted into QSFP28 ports 28 through
31, the port forms a port group and disables two QSFP+ ports. See Table 5 on page 31.
Table 5: Default Behavior of 100 Gigabit Ethernet Ports
Disables 40 Gigabit Ethernet QSFP+ Ports100 Gigabit Ethernet QSFP28 Ports
Port 20 and 21Port 29
Port 22 and 23Port 28
Port 24 and 25Port 30
Port 26 and 27Port 31
CAUTION: As shown in Table 5 on page 31, ports 20 through 23 might not
be available forchannelizationif you have populatedthe 100 Gbps QSFP28
ports.
•
Flexi-pic mode (from Junos OS Release 17.2R1 up to Junos OS Release 18.1R1):
•
Ports 0 through 19 of the switch are configured for 40-Gigabit Ethernet and can be
channelized to 4 independent 10-Gigabit Ethernet ports.
•
Ports 20 though 27 are disabled. See Table 5 on page 31.
•
Ports 28 through 31 are configured as 100-Gigabit Ethernet.
CAUTION: Takecare when changingthechannelizationmodefromFlexi-pic
to default. If you have existing ports that are channelized in Flexi-pic mode,
remove the channelization from the interface before changing the system
mode. Changing the Flexi-pic mode to the default mode with channelized
ports causes the ports to go down, loga system log error, and remain down.
You must manually remove the channelization configuration on the ports
to bring the ports up in default mode. Because there can be a slight loss of
data while the FPC reboots, we recommend that you only configure the
changes during a maintenance window for this release.
31Copyright © 2019, Juniper Networks, Inc.
Chapter 1: Overview

Juniper QFX Series Specifications

General

Category	Switch
Series	QFX
Form Factor	1U, 2U, and modular chassis options
Power Supply	Redundant, hot-swappable power supplies
Cooling	hot-swappable fans
Virtual Chassis	Supported on certain models
Typical Use	Data center, cloud
Operating System	Junos OS
Management	CLI
Key Features	High performance, low latency, automation
Latency	Sub-microsecond latency
Port Density	Varies by model (e.g., QFX5100: up to 48x10GbE + 6x40GbE)