Understanding Software Upgrade in a Virtual Chassis
A virtual chassis can be composed of multiple EX 4200-series switches and each member switch is running JUNOS software packages. For ease of management, the virtual chassis provides flexible methods to upgrade software releases.
A new software release can be upgraded to the entire virtual chassis or to a particular member in the virtual chassis through a CLI or J-Web command. A user can add software packages to either a single member of the virtual chassis or to all members of the virtual chassis at the same time.




