Virtual Chassis And Virtual Chassis Fabric Support - Juniper QFX5100 Hardware Manual

Virtual Chassis and Virtual Chassis Fabric Support

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Copyright © 2017, Juniper Networks, Inc.
All 96 SFP+ ports on the switch (PIC 0) are supported. In this mode, the eight QSFP+
ports are not supported and cannot be channelized. There is no packet loss for packets
of any size in this mode.
Default mode
All 96 SFP+ ports on the switch (PIC 0) are supported. QSFP+ ports
be channelized. If ports
96
, , and are disabled.
101 102 103
The QFX5100-96S switch operates as a standalone switch, as a member in a QFX Virtual
Chassis, or as a spine or leaf device in a Virtual Chassis Fabric (VCF). QFX Virtual Chassis
support up to 10 members; VCF supports a total of 20 devices, of which 4 QFX5100
devices can be configured as spines. A QFX Virtual Chassis is cabled in a ring topology,
where a VCF is cabled in a spine and leaf topology.
Virtual Chassis
In a QFX Virtual Chassis, you can connect up to 10 standalone QFX5100-96S switches
into a QFX Series Virtual Chassis and manage the interconnected switches as a single
chassis. The advantages of connecting multiple switches into a Virtual Chassis include
better-managed bandwidth at a network layer, simplified configuration and maintenance
because multiple devices can be managed as a single device, increased fault tolerance
and high availability (HA) because a Virtual Chassis can remain active 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.
Field-Replaceable Units in a QFX5100 Device on page 28
Port Panel of a QFX5100-24Q Device on page 16
Port Panel of a QFX5100-48S Device on page 21
Access Port and Uplink Port LEDs on a QFX5100 Device on page 29
Chapter 2: Chassis Components and Descriptions
and are channelized, the interfaces on ports
100
96 and 100 can
, , ,
97 98 99
27