Follow these environmental guidelines:
•
The site must be as dust-free as possible, because dust can clog air intake vents and
filters, reducing the efficiency of the switch cooling system.
•
Maintain ambient airflow for normal switch operation. If the airflow is blocked or
restricted, or if the intake air is too warm, the switch might overheat, leading to the
switch temperature monitor shutting down the device to protect the hardware
components.
Table 21 on page 57 provides the required environmental conditions for normal switch
operation for all QFX5110 models.
Table 21: QFX5110 Environmental Tolerances
ToleranceDescription
No performance degradation to 13000 feet (3962 meters)Altitude
Normal operation ensured in relative humidity range of 5% through 90%,
noncondensing
•
Short-term operation ensured in relative humidity range of 5% through 93%,
noncondensing
NOTE: As defined in NEBS GR-63-CORE, Issue 3, short-term events can be
up to 96 hours in duration but not more than 15 days per year.
Relative humidity
•
Normal operation ensured in temperature range of 32° F through 104° F (0° C
through 40° C)
•
Nonoperating storage temperature in shipping container: –40° F through 158° F
(–40° C through 70° C)
Temperature
Designed to complywith Zone4 earthquake requirements per NEBS GR-63-CORE,
Issue 3.
Seismic
NOTE: Install QFX Series devices only in restricted areas, such as dedicated
equipment rooms and equipment closets, in accordance with Articles 110-16,
110-17, and 110-18 of the National Electrical Code, ANSI/NFPA 70.
See Also Standalone Installation Overview on page 85•
57Copyright © 2019, Juniper Networks, Inc.
Chapter 2: Site Planning, Preparation, and Specifications
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