QFX5100 Site Guidelines and Requirements
Environmental Requirements and Specifications for a QFX5100 Device
The switch must be installed in a rack or cabinet. It must be housed in a dry, clean, well-ventilated, and temperature-controlled environment.
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 1 provides the required environmental conditions for normal switch operation.
Table 1: QFX5100 Switch Environmental Tolerances
No performance degradation to 6,562 feet (2000 meters)
Normal operation ensured in relative humidity range of 5% through 90%, noncondensing
Designed to comply with Zone 4 earthquake requirements per NEBS GR-63-CORE, Issue 3.
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.
General Site Guidelines
Efficient device operation requires proper site planning and maintenance and proper layout of the equipment, rack or cabinet (if used), and wiring closet.
To plan and create an acceptable operating environment for your device and prevent environmentally caused equipment failures:
Keep the area around the chassis free from dust and conductive material, such as metal flakes.
Follow prescribed airflow guidelines to ensure that the cooling system functions properly and that exhaust from other equipment does not blow into the intake vents of the device.
Follow the prescribed electrostatic discharge (ESD) prevention procedures to prevent damaging the equipment. Static discharge can cause components to fail completely or intermittently over time.
Install the device in a secure area, so that only authorized personnel can access the device.
Site Electrical Wiring Guidelines
Table 2 describes the factors you must consider while planning the electrical wiring at your site.
You must provide a properly grounded and shielded environment and use electrical surge-suppression devices.
Avertissement Vous devez établir un environnement protégé et convenablement mis à la terre et utiliser des dispositifs de parasurtension.
Table 2: Site Electrical Wiring Guidelines
Site Wiring Factor
If your site experiences any of the following problems, consult experts in electrical surge suppression and shielding:
Radio frequency interference
To reduce or eliminate RFI from your site wiring, do the following:
If your site is susceptible to problems with electromagnetic compatibility (EMC), particularly from lightning or radio transmitters, seek expert advice.
Some of the problems caused by strong sources of electromagnetic interference (EMI) are:
Grounding Cable and Lug Specifications for a QFX5100 Device
For installations that require a separate grounding conductor to the chassis, the switch must be adequately grounded before power is connected to ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements. To ground a QFX5100 device, connect a grounding cable to earth ground and then attach it to the chassis grounding points.
The switch is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal provided on the chassis in addition to the grounding pin of the power supply cord. This separate protective earthing terminal must be permanently connected to earth ground for installations that require a separate grounding conductor to the chassis.
To comply with GR-1089 requirements, all intra-building copper cabling used for SFP+ and QSFP+ ports must be shielded and grounded at both ends.
Before switch installation begins, a licensed electrician must attach a cable lug to the grounding cables that you supply. See Connecting Earth Ground to a QFX5100 Device. A cable with an incorrectly attached lug can damage the switch.
Before connecting the switch to earth ground, review the following information:
A protective earthing terminal bracket is provided in the accessory kit for connecting the switch to earth ground. This L-shaped bracket attaches to the side of the QFX5100 chassis through the mounting bracket, providing a protective earthing terminal for the switch.
The grounding lug required is a Panduit LCD10-10A-L or equivalent (not provided).. The grounding lug should accommodates 14–10 AWG (2–5.3 mm²) stranded wire.
The grounding cable that you provide for a QFX5100 device must be 14 AWG (2 mm²), minimum 60° C wire, or as permitted by the local code.
Ensure you have two SAE 10-32 washers and screws to attach the cable and bracket (not provided).
Rack Requirements for a QFX5100 Device
All QFX5100 devices are designed to be installed on four-post racks. The QFX5100-96S device can also be installed on two-post racks.
Rack requirements consist of:
Mounting bracket hole spacing
Rack size and strength
Table 3 provides the rack requirements and specifications for the QFX5100 device.
Table 3: Rack Requirements for the QFX5100 Device
Rack type (all product SKUs)
Use a four-post rack that provides bracket holes or hole patterns spaced at 1 U (1.75 in. or 4.45 cm) increments and that meets the size and strength requirements to support the weight.
A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics Industry Association.
Rack type (QFX5100-96S only)
Use a two-post or four-post rack that provides bracket holes or hole patterns spaced at 1 U (1.75 in. or 4.45 cm) increments and that meets the size and strength requirements to support the weight.
Mounting bracket hole spacing (all product SKUs)
The holes in the mounting brackets are spaced at 1 U (1.75 in. or 4.45 cm), so that the switch can be mounted in any rack that provides holes spaced at that distance.
Rack size and strength (all product SKUs)
Rack connection to building structure
Cabinet Requirements for a QFX5100 Device
You can mount the QFX5100 device in an enclosure or cabinet that contains a four-post 19-in. open rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Industry Association.
Cabinet requirements consist of:
Cabinet size and clearance
Cabinet airflow requirements
Table 4 provides the cabinet requirements and specifications for the QFX5100 device.
Table 4: Cabinet Requirements for the QFX5100 Device
Cabinet size and clearance
The minimum cabinet size for accommodating a QFX5100 device is 36 in. (91.4 cm) deep. Large cabinets improve airflow and reduce the chance of overheating.
Cabinet airflow requirements
When you mount the switch in a cabinet, ensure that ventilation through the cabinet is sufficient to prevent overheating.