What is the difference between write memory and copy running config startup config
In the context of networking devices, such as routers and switches, there are two similar but distinct commands: "write memory" and "copy running-config startup-config". Understanding the difference between these commands is essential for managing network configurations effectively.
write memory
The "write memory" command saves the current running configuration to the device's non-volatile memory, typically flash memory. This command does not affect the startup configuration. The changes made to the running configuration are preserved even after a reboot or power cycle. However, if the device loses power or the flash memory fails, the configuration changes will be lost.
copy running-config startup-config
The "copy running-config startup-config" command copies the current running configuration to the startup configuration. The startup configuration is stored in non-volatile memory and is used to initialize the device's configuration when it boots up. By copying the running configuration to the startup configuration, the changes made to the running configuration become permanent and will be retained even after a reboot or power cycle.
In summary, the "write memory" command saves changes to the running configuration only, while the "copy running-config startup-config" command saves changes to both the running configuration and the startup configuration, making them persistent across reboots.
Related Questions
Q: What is the purpose of the "write memory" command? A: To save changes to the running configuration to non-volatile memory.
Q: What is the purpose of the "copy running-config startup-config" command? A: To save changes to both the running and startup configurations, making them persistent across reboots.
Q: When should I use the "write memory" command? A: When you want to save changes to the running configuration but don't want to make them permanent.
Q: When should I use the "copy running-config startup-config" command? A: When you want to save changes to the running configuration and make them permanent.
Q: What happens if I lose power after using the "write memory" command? A: The changes to the running configuration will be lost.
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