wr
or copy running-config startup config
NVRAM (Non-Volatile Random Access Memory) serves primarily to store configuration settings and data that must persist even when the power is turned off, such as BIOS settings in computers or network configuration in routers. Additionally, it can be used for caching data to enhance system performance, ensuring quick access to frequently used information without loss during power outages.
NVRAM (Non-Volatile Random Access Memory) serves two primary functions: it retains data even when power is turned off, making it ideal for storing system configurations and settings, such as BIOS or firmware settings. Additionally, NVRAM provides fast access to this data, allowing systems to quickly retrieve configuration information during boot processes or when needed for operational tasks.
Control plane: responsible for determining the best paths for network traffic using routing protocols. Data plane: handles the actual forwarding of network packets based on information provided by the control plane.
On NVRAM.
show startup-config
erase startup-config
On NVRAM.
NVRAM
NVRAM
The IOS command to copy the running configuration to NVRAM is copy running-config startup-config. This command saves the current configuration in RAM (running config) to the non-volatile memory (NVRAM), ensuring that the configuration is preserved after a reboot. You can also use the shorthand version, wr or write memory, to achieve the same result.
Data stored in nvram is erased
The router command used to copy the running configuration to NVRAM is copy running-config startup-config. This command saves the current active configuration so that it will be retained after a reboot. You can also use the shorthand version wr (short for "write memory") to achieve the same result.
NVRAM is that router component in which start up configuration file is stored.
NVRAM Stores startup-config. The IOS (Internetwork Operating System) is stored in the flash. Both flash and NVRAM are non volatile storages but there is a major difference.
To save the running configuration on a router, you typically use the command copy running-config startup-config in the privileged EXEC mode. This command copies the current configuration stored in RAM (running-config) to NVRAM (startup-config), ensuring that the configuration is retained after a reboot. Alternatively, you can use the shorthand command write memory. Always confirm the save by checking the startup configuration with the show startup-config command.