Cisco VG224 Software Guide - Page 56

Entering the ROM Monitor Mode Appendix C Using the ROM Monitor Configuring Verifying To enter the ROM monitor mode, do the following: Command or Action Step 1 Router> reload Step 2 Press the Break key during the first 60 seconds while the system is starting up. Purpose Restarts the Cisco VG224. Forces the router to stop booting and enter the ROM monitor mode. To verify that you are in ROM monitor mode, check that the prompt displayed on your screen is the ROM monitor mode prompt: rommon # > The # is the line number and increases incrementally at each prompt. Tip From the Cisco IOS software, you can configure the router to automatically enter the ROM monitor mode the next time the router boots by setting virtual configuration register bits 3, 2, 1, and 0 to zero. From the console, enter the following configuration command: configuration-register 0x0 The new configuration register value, 0x0, is effective after the router is rebooted with the reload command. The router remains in ROM monitor and does not boot the operating system. As long as the configuration register value remains 0x0, you must manually boot the operating system from the console. Refer to the boot command in the section "Command Descriptions" later in this appendix. ROM Monitor Commands Enter ? or help at the ROM monitor mode prompt to display a list of available commands. For example: rommon 1 > alias boot break confreg cont context cookie dev dir dis dnld frame fpga-pref help history meminfo repeat ? 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 select an FPGA monitor builtin command help monitor command history main memory information repeat a monitor command Cisco VG224 Voice Gateway Software Configuration Guide C-2 OL-5005-01