and highavailability (HA) because a Virtual Chassis can remainactive and network traffic
can be redirected to other member switches when a single member switch fails, and a
flatter, simplified Layer 2 network topology that minimizes or eliminates the need for
loop prevention protocols such as Spanning Tree Protocol (STP).
Virtual Chassis Fabric
The VCF provides a low-latency, high-performance fabric architecture that can be
managed as a single device. VCF is an evolution of the Virtual Chassis feature, which
allows you to interconnect multiple devices into a single logical device, inside of a fabric
architecture. The VCF architecture is optimized to support small and medium-sized data
centers that contain a mix of 1-Gpbs, 10-Gpbs, and 40-Gbps Ethernet interfaces.
A VCF is constructed using a spine-and-leaf architecture and topology. In the
spine-and-leaf architecture, each spine device is interconnected to each leaf device. A
VCF supports up to 20 devices, of which 4 QFX5100 devices can be configured into spine
devices. In a mixed environment with QFX5100-24Q, QFX5100-98S and EX4300, use
the QFX5100-24Q as the spine device and the QFX5100-96S and EX4300 as a leaf
devices. You may use the QFX5100-96S as a spine in an all QFX5100-96S VCF or in a
VCF that has a mixture of QFX5100-96S and EX4300.
Related
Documentation
Field-Replaceable Units in a QFX5100 Device on page 12•
• Port Panel of a QFX5100-24Q Device on page 23
• Port Panel of a QFX5100-48S Device on page 28
• Access Port and Uplink Port LEDs on a QFX5100 Device on page 57
• Installing and Removing QFX5100 Device Hardware Components on page 201
• Connecting QFX Series and EX Series Switches in a QFX Virtual Chassis
Expansion Modules for QFX5100 Devices
The QFX5100-24Q and QFX5100-24Q-AA devices have two bays on the port panel for
optional expansion modules. These expansion modules can be hot-inserted or
hot-removed. Expansion modules and transceivers are not shipped with the switch and
must be ordered separately.
The QFX5100-24Q and QFX5100-24Q-AA support these expansion modules up to the
104-port limitation:
•
Two EX4600-EM-8F, which provides a total of 16 additional 10-Gigabit Ethernet
Enhanced Small Form-Factor Pluggable (SFP+) ports.
•
Two QFX-EM-4Q, which provides a total of 8 additional 40-Gigabit Quad SFP+
(QSFP+) ports.
•
One EX4600-EM-8F and one QFX-EM-4Q, which provides 8 additional 10-Gigabit
Ethernet SFP+ and 4 additional 40-Gigabit (QSFP+) ports. This combination requires
the system mode to be configured as Flexi-pic. See Configuring the System Mode.
Copyright © 2016, Juniper Networks, Inc.34
QFX5100 Switch Hardware Guide
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