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 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:
Table 20: Deployment Checklist
DatePerformed ByFor More InformationItem or Task
Components
Understanding Virtual Chassis Fabric
Components
Determine the number of devices in
the VCF and the role of each device.
NOTE: A VCF is not constrained to a
single building; the limits for the optic
cable are the only consideration.
Environment
Understanding Virtual Chassis Fabric
Configuration
Evaluate the provisioning options and
determine the configuration method
that applies to your deployment.
Power
Measure the distance between
external power sources and switch
installation site.
QFX5110 AC Power Specifications
AC Power Specifications for a QFX5100 Device
AC Power Specifications for a QFX3600 or
QFX3600-I Device
“AC Power Specifications for a QFX3500
Device” on page 55
AC Power Supply Specifications for EX4300
Switches
Calculate the powerconsumption and
requirements.
Rack or Cabinet
49Copyright © 2017, Juniper Networks, Inc.
Chapter 5: Preparation Overview
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