Upgrade the bootloader Program via the Console Port

Network Requirements

• PC and the Console port of the device are directly connected.
• The bootloader program is to be upgraded through the Console port.

Network Topology

Figure 10-3 Upgrading the bootloader Program via the Console Port

Configuration Steps

Step 1: Connect PC and the Console port of the device properly.(Omitted)

Step 2: Open the bootloader screen.

When the device is just started and the " Press ctrl+c to enter bootloader mode: 0 " message is printed, press and hold Ctrl + C to open the bootloader screen.

Step 3: Set the transmission rate to 115200 bps to improve the upgrade speed.

#After setting the transmission speed of the Console port of bootloader, you should set the transmission speed of the HyperTerminal also to 115200 bps.

Step 4: On the bootloader screen, upgrade the bootloader version.

#Input the mupdate bootloader command, and use ymodem to transmit the bootloader file that has been saved on the PC.

#Check the result.

#After the upgrade is completed, the following message is printed under the bootloader screen.

Step 5: Check the result.

#After the upgrade is completed and the device is restarted, the system is booted by the new bootloader, and the following message is printed:

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  Upgrade through the Console port is complex and slow, so the TFTP/FTP upgrade mode is recommended. The Console port upgrade mode is used only when the upgrade conditions of the TFTP/FTP upgrade mode fail to be satisfied.
• After the upgrade is completed, use the reset command to exit bootloader program. Then, the new bootloader program boots the loading of the image program.
• If the default rate of the Console port has been modified in upgrading the bootloader program, in loading the image program package, the rate of the device Console port automatically resumes to 9600 bps. At this time, the rate of the HyperTerminal needs to be modified synchronously.

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