#MACTRACKER BOOT ROM VERSION PC#
Upgrading the system image when there are no TFTP servers or network connections, and a direct PC connection to the router console is the only viable option-See information about upgrading the system image in the configuration documentation for your router.See the “Loading a System Image (boot)” section. This can be useful for testing a new system image or for troubleshooting. Manually loading a system image-You can load a system image without configuring the router to load that image in future system reloads or power-cycles.Use ROM monitor in the following situations: To exit ROM monitor mode, see the “Exiting ROM Monitor Mode” section. The Break key sequence was entered during the first 60 seconds after reloading the router.The last digit of the boot field in the configuration register is 0 (for example, 0x100 or 0x0).During power up or reload, the router did not find a valid system image.The router boots to ROM monitor mode when one of the following occurs: The x variable begins at 1 and increments each time you press Return or Enter in ROM monitor mode. The ROM monitor uses the rommon x > command prompt. Information About the ROM Monitorīefore using the ROM monitor, you should understand the following concepts: For help, see the hardware installation guide for your router.
#MACTRACKER BOOT ROM VERSION HOW TO#
The following sections describe how to use the ROM monitor in the Cisco 3900 series, 2900 series, 1900 series integrated services routers (ISRs) to manually load a system image or upgrade the system image for disaster, or when there are no TFTP servers or network connections.Ĭonnect a terminal or PC to the router console port. The ROM monitor is accessed during power up or reload when the router does not find a valid system image, the last digit of the boot field in the configuration register is 0, or you enter the Break key sequence during the first 5 seconds after reloading the router. ROM Monitor Console Communication Failure.Troubleshooting Crashes and Hangs (stack, context, frame, sysret, meminfo).Obtaining Information on USB Flash Devices.Modifying the Configuration Register (confreg).Displaying Files in a File System (dir).Displaying Commands and Command Syntax in ROM Monitor Mode (?, help, -?).Setting the Configuration Register to Boot to ROM Monitor Mode.Using the Break Key Sequence to Interrupt the System Reload and Enter ROM Monitor Mode.How to Use the ROM Monitor-Typical Tasks.Prerequisites for Using the ROM Monitor.
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