•
A spine or leaf device in a standard QFX5100 Virtual Chassis Fabric (VCF).
VCF uses Virtual Chassis technology to interconnect multiple devices into a single logical device and
manage that device as a single logical device inside of a fabric architecture. VCF architecture supports
up to 20 total devices in a spine and leaf topology. Out of the 20 total devices, you can configure a
maximum of 4 spine devices.
A QFX5100 VCF uses QFX5100 devices as spines or leaf devices. You can also use QFX3500, QFX3600,
and EX4300 models as leaf devices in a QFX5100 VCF.
Whenever possible, configure the QFX5100-24Q as the spine device in a QFX5100 VCF.
•
A leaf device in a QFX5110 VCF.
A QFX5110 VCF must have a minimum of two QFX5110-32Q as spine devices. Junos OS Release
17.3R1 or later is required for QFX5110 VCF.
•
A satellite device in a Junos Fusion system.
Junos OS Release 14.2.3 or later is required for Junos Fusion.
System Software
QFX Series devices use the Junos operating system (OS), which provides Layer 2 and Layer 3 switching,
routing, and security services. Junos OS is installed on a QFX5100 switch’s 32-gigabyte (GB) internal solid
state flash drive. The same Junos OS code base that runs on QFX5100 switches also runs on all Juniper
Networks EX Series switches, M Series, MX Series, and T Series routers.
Participation in a QFX5110 Virtual Chassis or a QFX5110 VCF requires the same Junos OS image on all
devices in the Virtual Chassis or VCF. Junos OS 17.3R1 or later is the minimum software release for
QFX5110 Virtual Chassis or QFX5110 VCF.
For more information about which features are supported on QFX Series devices, see Feature Explorer.
You manage the switch using the Junos OS command-line interface (CLI), accessible through the console
and out-of-band management ports on the device.
RELATED DOCUMENTATION
QFX5100 Device Models
Virtual Chassis Fabric Hardware Overview | 8
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