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Understanding Nonvolatile Storage in an EX Series Virtual Chassis
 | Note: This topic applies to all EX Series Virtual Chassis except EX8200 Virtual Chassis. See Understanding File Storage in an EX8200 Virtual Chassis for information about EX8200 Virtual Chassis. |
The EX2200, EX3300, EX4200, EX4500, and EX4550 switches store the Juniper Networks Junos operating system (Junos OS) system files in internal flash memory. In the Virtual Chassis configurations, both the master and the backup switch store the configuration information for all the member switches.
Nonvolatile Memory Features
Junos OS 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.
