Cisco 3725 Hardware Installation Guide - Page 94
Enter ROM Monitor Mode by Using the reload Command - enter rommon
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ROM Monitor Commands Appendix B Using the ROM Monitor The two methods of entering the ROM monitor mode are as follows. Enter ROM Monitor Mode by Using the reload Command Connect to the router from a console, and follow these steps: Step 1 Step 2 Restart the router with the reload command. Router# reload Press the Break key during the first 60 seconds of the system booting. This forces the router into ROM monitor mode, and the ROM monitor prompt appears: rommon 1> Enter ROM Monitor Mode by Resetting the Configuration Register Connect to the router from a console, and follow these steps: Step 1 Step 2 Set the bits 3, 2, 1, and 0 of the configuration register to zero. Router# configuration-register 0x0 Restart the router with the reload command. Router# reload The router boots into ROM monitor mode, and the ROM monitor prompt is displayed: rommon 1> Note The number that appears in the ROM monitor prompt (1>, 2>, and so forth) is the line number. It increments each time you enter a ROM monitor command. ROM Monitor Commands Enter ? or help at the ROM monitor prompt to see a list of available commands. For example: rommon 1> alias boot break confreg cont context cookie dev dir dis dnld frame ? set and display aliases command boot up an external process set/show/clear the breakpoint configuration register utility continue executing a downloaded image display the context of a loaded image display contents of cookie PROM in hex list the device table list files in the file system display instruction stream serial download a program module print out a selected stack frame Cisco 3700 Series Routers Hardware Installation Guide B-2 OL-2180-08