Juniper QFX Series Hardware Guide

Table 39: Chassis Alarm Messages
Recommended ActionCLI MessageAlarm TypeComponent
Replace the fan module and report the
failure to customer support.
Fan FailureMajor (red)Fans
Check the system log for one of the
following error messages and report the
message to customer support:
•
CM ENV Monitor: Get fan speed failed.
•
fan-number is NOT spinning @ correct
speed, where fan-number can be 1, 2, 3,
4, or 5.
Fan I2C Failure
Remove and check the fan module for
obstructions, and then reinsert the fan
module. If the problem persists, replace
the fan module.
Fan fan-number Not Spinning
Check the system log for the error
message fan-number Absent, where
fan-number can be can be 1, 2, 3, 4, or 5.
Install fan modules in the slots where
they are absent.
Fan/Blower AbsentMinor (yellow)
127Copyright © 2019, Juniper Networks, Inc.
Chapter 5: Troubleshooting Hardware

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)