![]() ![]() The other two XML files are used for encryption purposes. The file 4.bin is an IOS image for the 1900 Integrated Services Router series. To show the contents of the flash memory, the show flash: command is used: R2#show flash:ģ 33591768 4.binĢ49856K bytes of processor board System flash (Read/Write) This file is usually stored in the flash memory, since this type of memory will retain the stored files even after the router is powered off or rebooted. In the new GNS3 1.4, there is a way to run a second category of switches and routers. For older images, we use and maintain Dynamips an emulator dedicated to emulate some Cisco hardware. ![]() The IOS image is a single file that is loaded into RAM when the device boots. GNS3 offers multiple ways to emulate IOS. rw means that the file system is read/write. disk represents the flash memory, and nvram represents the NVRAM memory
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