Connecting A Qfx5100 Device In A Virtual Chassis Fabric - Juniper QFX5100 Hardware Manual

Connecting a QFX5100 Device in a Virtual Chassis Fabric

Copyright © 2017, Juniper Networks, Inc.
Adding a New Switch to an Existing QFX Series Virtual Chassis (CLI Procedure)
Connecting QFX Series and EX Series Switches in a QFX Virtual Chassis
Connecting a QFX5100 Device in a Virtual Chassis Fabric on page 127
A Juniper Networks Virtual Chassis Fabric (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. Supported devices in a VCF are:
QFX5100-24Q (spine or leaf)
QFX5100-48S (spine or leaf)
QFX5100-48T (leaf)
QFX5100-96S (leaf)
QFX3600 (leaf)
QFX3500 (leaf)
EX4300 (leaf)
BEST PRACTICE:
leaf devices.
An all QFX5100 installation is the optimum VCF configuration. When multiple models
of the QFX5100 are in a VCF, use QFX5100-24Q, if available, as the spine. Installations
with all members within the same line of switches (for example, QFX5100-24Q,
QFX5100-48S, QFX5100-48T, and QFX5100-96S) are homogeneous configurations.
VCF installations with EX4300, QFX3500, or QFX3600 leaf members are called mixed
mode. Mixed mode devices must be configured before joining the VCF and are not eligible
for the auto-provisioned configuration (plug and play). Adding a device configured as
mixed mode to a VCF can cause those devices to be marked inactive if the other devices
are not also configured as mixed mode.
All VCF installations can support 20 total devices, of which 4 QFX5100 devices can be
configured into spine devices.
You can install a VCF in a single rack, multiple racks, or in wire closets. You construct a
VCF by cabling and then configuring SFP+ or QSFP+ interfaces into Virtual Chassis ports
(VCPs). All non-channelized QSFP+ uplink interfaces on QFX5100 switches can be
configured into VCPs. All fixed SFP+ interfaces on QFX5100-96S switches can also be
configured into VCPs.
BEST PRACTICE:
Chapter 11: Connecting the Switch to the Network
Use QFX5100-24Q as spine devices and any QFX5100 as
Use 40-Gigabit QSFP+ ports as VCPs.
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