Flash in a router refers to a type of non-volatile memory used to store the router's firmware, operating system, and configuration files. Unlike volatile memory, which loses its data when powered off, flash retains information even when the device is turned off. This allows the router to boot up with the necessary software and settings each time it is powered on. Flash memory can typically be updated or erased, allowing for firmware upgrades and configuration changes.
What is the purpose of using the copy tftp flash command on a router? to back up the current IOS image to a server to restore the IOS image from a server to back up the router configuration to a server to restore the router configuration from flash
flash
Flash Memory
TFTP server, Flash
A router stores its IOS (Internetwork Operating System) in non-volatile memory, typically in Flash memory. This allows the IOS to persist even when the router is powered off or restarted. The configuration files, which define how the router operates, can also be stored in NVRAM (Non-Volatile Random Access Memory) or Flash, depending on the setup. This ensures that the router can boot up with the correct operating system and settings.
To install IOS on a Cisco 2600 router, first, download the appropriate IOS image from Cisco's website (ensure you have the necessary permissions). Next, connect to the router via console cable and use a terminal emulator to access the command line. Transfer the IOS image to the router using TFTP or a similar method, then use the copy tftp flash command to copy the image to the router's flash memory. Finally, configure the router to boot from the new IOS image by updating the boot system command in the configuration and rebooting the router.
NVRAM, ROM, and flash memory
to TFTP
There are three major parts of the router that can be upgraded:DRAM memory, Flash Memory, and the IOS operating system that runs on it.DRAM and Flash can each be a maximum of 16 MB (try ebaying for cisco 2500 flash or memory), and IOS images can be downloaded from Cisco if you have a valid Cisco service contract.
Flash memory
CPU RAM Flash memory Console port fast Ethernet port
config tftp run