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Juniper was the first North American IP routing vendor to achieve the prestigious TL 9000 certification by the Quality of Excellence for Suppliers of Telecommunications (QuEST) Forum in the router category, for design, development, provision and service and support.



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Understanding Nonvolatile Storage in a Virtual Chassis Configuration

The EX 4200 switch stores JUNOS system files in internal flash memory. In a Virtual Chassis configuration, both the master and the backup switch store the configuration information for all the member switches.

Nonvolatile Memory Features

The JUNOS software for EX-series switches optimizes the way the Virtual Chassis stores its configuration if a member switch or the Virtual Chassis configuration is shut down improperly:

  • If the master is not available, the backup switch takes on the role of the master and its internal flash memory takes over as the alternate location for maintaining nonvolatile configuration memory.
  • If a member switch is taken offline for repair, the master stores the configuration of the member switch.