On NVRAM.
That's where the router's startup-config (startup configuration) is stored.That's where the router's startup-config (startup configuration) is stored.That's where the router's startup-config (startup configuration) is stored.That's where the router's startup-config (startup configuration) is stored.
On NVRAM.
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.
wr or copy running-config startup config
The startup configuration file on a Cisco router contains the configuration settings that are loaded into the router's memory when it boots up. It specifies parameters such as interface settings, routing protocols, access control lists, and other operational settings required for the router to function properly. This file is stored in the router's non-volatile memory (NVRAM), ensuring that the configuration persists even when the router is powered off. Essentially, it serves as the baseline configuration that the router uses to establish its operational state.
When a router boots up, it follows a default order to search for startup configuration information. First, it checks the non-volatile memory (NVRAM) for the startup configuration file, typically named "startup-config." If it doesn't find a valid configuration there, it may look for a configuration file in a TFTP server, and if that fails, the router will proceed with its default settings, often leading to a mode where no configurations are applied.
A technician would enter the command copy startup-config running-config to copy the configuration stored in the startup configuration file (which is saved in NVRAM) to the running configuration (stored in RAM). This action allows the device to apply previously saved settings without needing to re-enter them manually. It is often used after making changes to ensure that the system is configured as intended. Additionally, it can help restore configurations after a reboot or power cycle.
erase startup-config
show startup-config
Boot Configuration Data (BCD)
NVRAM is that router component in which start up configuration file is stored.
When a Cisco router is booted up for the first time, or is reloaded, the router will look into its Non-Volatile RAM (NVRAM) for the startup configuration file. Setup Mode is usedto configure a Cisco router or switch after start up to create a startup configuration file.