Storing Switch Configuration Files
When you configure a switch, it needs to use the configuration. It also needs to be able to retain the configuration in case the switch loses power. Cisco Nexus switches contain random-access memory (RAM) to store data while Cisco NX-OS is using it, but RAM loses its contents when the switch loses power. To store information that must be retained when the switch loses power, Cisco switches use several types of more permanent memory, none of which has any moving parts. By avoiding components with moving parts (such as traditional disk drives), switches can maintain better uptime and availability.
The following list details the four main types of memory found in Cisco switches and the most common use of each type: ...
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