The cisco router enters the rommon mode.

The cisco router enters rommon mode. If the device starts and enters the rommon prompt, it may fail to start because of incorrect settings. First case: Check whether IOS exists by entering dir bootflash: Or dir flash: dir disk0 at the rommon prompt to check whether the file exists. Example of www.2cto.com: Dir bootflash:-#-ED -- type -- crc ----seek -- nlen-length------ date/time ------ name1 .. image 18794911 2FB1D0 23 2863440 Jan 01 2000 00:00:54 c7200-is-mz.122-23.bin5088 bytes available (3402784 bytes used) if the file exists, you can type boot bootflash: c7200-is-mz.121-21.bin to specify that the system starts from the file, typically the system can boot up. After the system enters normal mode, use the configuration method in the previous section to correct the boot system flash XXXX ). Www.2cto.com second case: If the startup is correct, the system still enters the rommon status every time. This may be because the register settings are incorrect. If it is in the rommon status, you can use confreg 0x2102 to correct the register value. If you use config-register 0x2102 in normal configuration mode, you can restart the storage disk. Case 3: If the flash file is not displayed, redo the system. The TFTP server uses the control line to connect the machine to the ROUTER. In addition, it uses a crossover network cable to connect the machine's Nic to the Ethernet port of the ROUTER. (You can also use a common network cable to connect a ROUTER to a vswitch and then connect to the machine.) After completing the above work, open the Super Terminal tool of the machine and connect it to the ROUTER, the command line prompt displayed in the window is ROMMON 1> ("1" indicates the number of lines in the command line ). Enter the command after the prompt: (you can press ctrl + break to enter ROMMON mode) ROMMON 1> IP_ADDRESS = IP address of the ROUTER (the IP address must be in the same network segment as the TFTP server) ROMMON 2> IP_SUBNET_MASK = ROUTER's subnet mask ROMMON 3> DEFAUT_GATEWAY = default gateway address (either no or TFTP Server) ROMMON 4> TFTP_SERVER = TFTP Server IP address ROMMON 5> TFTP_FILE = IOS file name (only file name is provided, no path is required) ROMMON 6> tftpdnld press ENTER Note: The preceding commands must be capitalized, the last tftpdnld must be in lower case. After the tftpdnld command is executed, enter the reset command to restart the ROUTER. Select the command as prompted. After the file is restarted, the system enters the familiar IOS mode. After the file is transferred, it will automatically return to the command, and even the previously configured information will not be lost. Www.2cto.com does not need ethernet cable to download data in this way. It takes about two hours to download data from a Super Terminal. The specific method is as follows: 1. After connecting the router with the Super Terminal, start the router and the router enters the monitoring mode status Rommon1> 2: Start the xmodem command Rommon2> xmodem-cx? Then press enter to confirm. When do you want to continue appears, select y3: Open the "transfer" menu of the Super Terminal, select transfer file, and open the transfer file window. Enter the location of the version file and select the xmodem mode. After confirmation, the version file will be downloaded from the computer to the vro using xmodem after several seconds. Note that during transmission, do not tamper with the keyboard or cancel it accidentally. It will take another two hours to wait for you!