Cabling EX4200 or EX4300 Series Switches Virtual Chassis for a QFX3000-G QFabric System Control Plane
A QFX3000-G QFabric system control plane and management network is formed by connecting the QFX Series devices in your network to two Virtual Chassis. In both a copper-based control plane and a fiber-based control plane, each Virtual Chassis is comprised of four EX4200-48T Series switches or EX4300-48P Series switches in a ring topology. You cannot mix the EX4200 with EX4300 Series switches in the same virtual chassis or in the same QFabric system.
The EX4200 has two dedicated 64-Gigabit Virtual Chassis Ports (VCP) that are used to cable the Virtual Chassis. These two ports are located on the rear, or field-replaceable unit (FRU) end of the EX4200. Likewise, the EX4300 has four 40-Gigabit Ethernet quad small form-factor pluggable plus (QSFP+) VCPs on the FRU end of the chassis.
Before you cable the four EX Series switches in a ring topology, install your EX4200 or EX4300 switches in a rack or cabinet. See Installing and Connecting an EX4200 Switch or Installing and Connecting an EX4300 Switch.