Recently I was building a Virtual-chassis with Juniper EX-series Switches. I’m now sharing my experience.
Virtual-chassis combines EX-series switches together as a one logical device. Basically, one control-plane (or Routing-Engine) and multiple data-planes (or Packet Forwarding Engines) are active concurrently.
In a basic virtual-chassis, multiple EX4200, EX4500 or EX4550 series switches are combined together. Mixed-mode Virtual-Chassis can have all of them in one single virtual-chassis.
I followed Juniper documentation and tried to create virtual-chassis. Step number 8 was a little bit unclear:
8. (Mixed Virtual Chassis with EX4200 switches only) Set the Virtual Chassis mode to mixed on all member switches if your mixed Virtual Chassis includes EX4200 switches:
user@switch> request virtual-chassis mode mixed