Virtual chassis is a feature in EX 4200 switches that allows you to interconnect two or more EX 4200 switches, enabling them to operate as a unified single high bandwidth switch. You can interconnect a maximum of 10 EX 4200 switches through the dedicated 64-Gbps virtual chassis ports (VCPs) or the uplink module ports configured as VCPs to form a virtual chassis. All EX 4200 switch models support virtual chassis, and you can interconnect different models, offering a range of port configurations, within the same virtual chassis.
The virtual chassis configuration includes designation of a master switch and a backup switch, with all other switches in the configuration designated as candidate switches. Virtual chassis operation is managed through the master switch. Each switch in the virtual chassis is assigned a unique identifier that is displayed on the switch LCD.