Non-Volatile RAM (NVRAM)

By Dan DiNicolo, June 6th, 2006 Posted in CCNA Study Guide Chapter 06. Subscribe to our RSS Feed

Non-Volatile Random Access Memory (NVRAM) is used as the storage location for the router’s startup configuration file. After the router loads its IOS image, the settings found in the startup configuration are applied. When changes are made to a router’s running configuration, they should always be saved to the startup configuration (stored in NVRAM) or they will be lost when the router shuts down. Remember that the running configuration is stored in RAM, which is erased when the router is powered down. On a Cisco 2500 series router, NVRAM is a relatively tiny 32KB in size.

Figure: Cisco router memory elements and purposes. 

Written by Dan DiNicolo - Visit Website

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