Connecting QFX Series and EX Series Switches in a QFX Virtual Chassis
IN THIS SECTION
Before You Start | 345
Valid Configurations | 346
Cabling QFX3500 Switches in a QFX5100 Virtual Chassis | 347
Cabling QFX3600 Switches in a QFX Virtual Chassis | 348
Cabling a Mixed QFX Virtual Chassis | 349
In a QFX Virtual Chassis, you can connect up to 10 standalone QFX5100, QFX3600, QFX3500, and EX4300
switches except EX4300-48MP and EX4300-48MP-S switches into a QFX Series Virtual Chassis and
manage the interconnected switches as a single chassis. Unlike a Virtual Chassis Fabric (VCF), which is
cabled in a spine and leaf topology, the QFX Virtual Chassis is cabled in a ring topology. For Virtual Chassis
Fabric cabling examples, see “Connecting a QFX5100 Device in a Virtual Chassis Fabric” on page 295.
As of Junos Release 17.3R1, you can also connect select models of the QFX5100 in the line card role in
a QFX5110 Virtual Chassis. See Connecting QFX5110 and QFX5100 Members in a QFX5110 Virtual Chassis.
This topic describes how to cable QFX Series switches and EX4300 switches into a QFX Virtual Chassis.
Before You Start
You configure a QFX Series Virtual Chassis by configuring the switch interfaces into Virtual Chassis ports
(VCPs). VCPs connect switches together to form a Virtual Chassis, and are responsible for passing all data
and control traffic between member switches in the Virtual Chassis. All non-channelized QSFP+ uplink
interfaces on standalone QFX5100 switches can be configured into VCPs. All fixed SFP+ interfaces on
QFX5100-96S switches can also be configured into VCPs.
Use the following interfaces to create VCPs:
•
On QFX5100, non-channelized QSFP+ uplink interfaces. All fixed SFP+ interfaces on the QFX5100-96S
switches are also available.
•
On EX4300 switches, the built-in QSFP+ ports are dedicated VCPs by default. In 48-port EX4300
switches except EX4300-48MP and EX4300-48MP-S switches, you can use the QSFP+ ports as network
ports or as VCPs. You can also use the SFP+ uplink module ports as VCPs by configuring these ports as
VCPs.
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