Juniper QFX Series Hardware Guide

QFX Virtual Chassis and QFX5110 Virtual Chassis allow you to interconnect a mixture of
up to ten switches into one logical device and manage the device as a single chassis.
QFX5200 Virtual Chassis is limited to three QFX5200-32C members.
A Virtual Chassis configuration has two Routing Engines—the master switch and the
backup switch. All other participating switches operate as line cards. You create a Virtual
Chassis by cabling the switches in a ring topology and configuring SFP+, QSFP+, or
QSFP28 interfaces into Virtual Chassis ports (VCPs). VCPs are responsible for passing
all data and control traffic between member switches in the Virtual Chassis. All
non-channelized QSFP28 or QSFP+ uplink interfaces on the switches can be configured
into VCPs. All fixed SFP+ interfaces can also be configured into VCPs.
All members of the Virtual Chassis are required to run the same Junos OS Release. You
can check the version and release by issuing the show chassis version CLI command.
This topic covers:
•
Valid Configurations for a QFX Virtual Chassis on page 63
•
Valid Configurations for a QFX5110 Virtual Chassis on page 64
•
Valid Configurations for a QFX5200 Virtual Chassis on page 64
•
VC Deployment Checklist on page 64
Valid Configurations for a QFX Virtual Chassis
Valid configurations are:
•
All QFX5100 members (homogenous)–Supported QFX5100 models are:
•
QFX5100-24Q
•
QFX5100-48S
•
QFX5100-48T
•
QFX5100-96S
•
All QFX3600 members (homogenous)
•
All QFX3500 members (homogenous)
•
A mixture of QFX3600 and QFX3500 members (heterogeneous)
•
A mixture of QFX5100, QFX3600, and QFX3500 members (heterogeneous)–use the
QFX5100 switches as master RE and backup RE whenever possible.
•
A mixture of QFX5100, QFX3600, QFX3500, and EX4300 members (heterogeneous).
EX4300 switches as the master RE or backup RE is not supported; use QFX5100
switches in these roles whenever possible.
An all EX4300 member is simply considered an EX4300 Virtual Chassis. See
Understanding EX Series Virtual Chassis.
If the QSFP+ interfaces are not available for VCP, 10-Gigbit interfaces can be used.
63Copyright © 2019, Juniper Networks, Inc.
Chapter 2: Site Planning, Preparation, and Specifications

Juniper QFX Series Specifications

General

Category	Switch
Series	QFX
Form Factor	1U, 2U, and modular chassis options
Power Supply	Redundant, hot-swappable power supplies
Cooling	hot-swappable fans
Virtual Chassis	Supported on certain models
Typical Use	Data center, cloud
Operating System	Junos OS
Management	CLI
Key Features	High performance, low latency, automation
Latency	Sub-microsecond latency
Port Density	Varies by model (e.g., QFX5100: up to 48x10GbE + 6x40GbE)