Juniper QFX Series Hardware Guide

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QFX5100 VCF
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QFX5100-24Q (spine or leaf)
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QFX5100-48S (spine or leaf)
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QFX5100-48T (leaf)
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QFX5100-96S (leaf)
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QFX3600 (leaf)
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QFX3500 (leaf)
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EX4300 (leaf)
Homogeneous configurations are Installations with all members within the same line of
switches (for example, QFX5100-24Q, QFX5100-48S, QFX5100-48T, and QFX5100-96S
in a QFX5100 VCF).QFX5100 VCF installations with a mixture of models are called mixed
mode. For example, a mixed mode QFX5100 VCF might contain a EX4300 or QFX3600
as leaf devices. Mixed mode devices must be configured before joining the VCF and are
not eligible for the auto-provisioned configuration (plug and play). Adding a device
configured as mixed mode to a VCF can cause those devices to be marked inactive if the
other devices are not also configured as mixed mode. In both mixed mode and
homogeneous configurations, you must run the same Junos OS release on all devices.
In a QFX5100 VCF, the optimum configuration comprises only QFX5100 models. When
both the QFX5100-24Q and the QFX5100-48S are available in a VCF, use the
QFX5100-24Q as the spine.
In a QFX5110 VCF, the optimum configuration comprises only QFX5110 models. When
multiple models of QFX5110 are in a VCF, use the QFX5110-32Q as the spine. All QFX5110
VCF configurations are considered homogeneous.
See Also Virtual Chassis Fabric Installation Overview on page 86•
Planning a Virtual Chassis Fabric Deployment
A Virtual Chassis Fabric (VCF) architecture supports up to 20 interconnected devices
that are managed as a logical single device. Supported platforms vary depending on the
QFX Series switch chosen for the spine. See Understanding Virtual Chassis Fabric
Components and “Virtual Chassis Fabric Hardware Overview” on page 66 for supported
configurations. Although the architecture has a powerful auto-provisioning option, which
allows you to plug and play the devices, careful planning of the deployment can avoid
unexpected results.
For example, if you perform any configuration level commands on one of the devices
(including assigning IP addresses or host names) you no longer can use auto-provisioning.
Use the following checklist to plan your deployment:
67Copyright © 2019, Juniper Networks, Inc.
Chapter 2: Site Planning, Preparation, and Specifications

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)