Planning a Virtual Chassis Deployment using QFX Devices
You can deploy QFX Series switches as members in two types of Virtual Chassis:
•
QFX Virtual Chassis
•
QFX5100 Virtual Chassis
Both types of 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. 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 switchesin the VirtualChassis. All non-channelizedQSFP28 or QSFP+
uplink interfaces on the switches can be configured into VCPs. All fixed SFP+ interfaces
can also be configured into VCPs.
This topic covers:
•
Valid Configurations for a QFX Virtual Chassis on page 48
•
Valid Configurations for a QFX5110 Virtual Chassis on page 49
•
VC Deployment Checklist on page 49
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 EX4300 Virtual Chassis.
If the QSFP+ interfaces are not available for VCP, 10-Gigbit interfaces can be used.
Copyright © 2017, Juniper Networks, Inc.48
QFX5110 Switch Hardware Guide
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