Juniper QFX3500, Hardware Documentation, Page: 404 / 669

Configuring a Nonprovisioned Virtual Chassis Fabric
CAUTION: Configure your Virtual Chassis Fabric (VCF) using autoprovisioning or
preprovisioning unless you have a compelling reason to use nonprovisioned
configuration. You can configure all aspects of a VCF using autoprovisioned or
preprovisioned configuration. The process for autoprovisioning your VCF is described
in “Autoprovisioning a Virtual Chassis Fabric” on page 368 and the process for
preprovisioning your VCF is described in “Preprovisioning a Virtual Chassis Fabric” on
page 373 .
Nonprovisioned VCF configuration is highly discouraged. Nonprovisioned VCF
configuration should only be used by VCF experts in specialized scenarios.
A nonprovisioned VCF is the configuration mode used when a VCF has not been configured into
autoprovisioned or preprovisioned mode.
In a nonprovisioned VCF, you configure the device roles by setting the primary-role priority value of each
device. If no primary-role priority values are set, a algorithm process runs and selects the role for each
device.
You must manually configure all Virtual Chassis ports (VCPs) in a nonprovisioned VCF. The automatic VCP
conversion feature, which automatically configures supported 10-Gbps SFP+ links and 40-Gbps QSFP+
links into VCPs on autoprovisioned and preprovisioned VCFs, is not supported on nonprovisioned VCFs.
Update all devices to the same version of Junos OS that supports VCF. See Installing Software Packages on
QFX Series Devices or Installing Software on an EX Series Switch with a Virtual Chassis or Single Routing Engine
(CLI Procedure).
CAUTION: QFX5100 switches running a Junos OS image that includes “-qfx-5-” in
the software package filename must be upgraded to a package filename that includes
“-qfx-5e-” before being added to a QFX5110 Virtual Chassis. See Upgrading a QFX5100
Switch with a USB Device to Join a QFX5110 Virtual Chassis or Virtual Chassis Fabric.
To configure a nonprovisioned VCF:
1. Power on the devices.
2. Configure each individual device into fabric mode. If needed for a mixed VCF, configure the devices
into mixed mode.
Reboot each device to complete this configuration step.
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