H3C S3610 Series Operation Manual page 32

Operation Manual – System Maintenance and Debugging
H3C S3610&S5510 Series Ethernet Switches
Enter your choice(0-9):
II. Loading Software Using XMODEM through Console Port
XMODEM is a file transfer protocol that is widely used due to its simplicity and good
performance. XMODEM transfers files via Console port. It supports two types of data
packets (128 bytes and 1 KB), two check methods (checksum and CRC), and multiple
attempts of error packet retransmission (generally the maximum number of
retransmission attempts is ten).
The XMODEM transmission procedure is completed by a receiving program and a
sending program: The receiving program sends negotiation characters to negotiate a
packet checking method. After the negotiation, the sending program starts to transmit
data packets. When receiving a complete packet, the receiving program checks the
packet using the agreed method. If the check succeeds, the receiving program sends
an acknowledgement character and the sending program proceeds to send another
packet; otherwise, the receiving program sends a negative acknowledgement
character and the sending program retransmits the packet.
1) Loading BootROM software
Follow these steps to load the BootROM software:
Step 1: At the prompt "Enter your choice(0-9):" in the Boot Menu, press <6> or
<Ctrl+U>, and then press <Enter> to enter the BootROM update menu shown below:
Bootrom update menu:
1. Set TFTP protocol parameter
2. Set FTP protocol parameter
3. Set XMODEM protocol parameter
0. Return to boot menu
Enter your choice(0-3):
Step 2: Enter 3 in the above menu to download the BootROM software using XMODEM.
The system displays the following download baud rate setting menu:
Please select your download baudrate:
1.* 9600
2. 19200
3. 38400
4. 57600
5. 115200
0. Return
Enter your choice (0-5):
Step 3: Choose an appropriate download baud rate. For example, if you enter 5, the
baud rate 115200 bps is chosen and the system displays the following information:
Download baudrate is 115200 bps
Please change the terminal's baudrate to 115200 bps and select XMODEM protocol
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Chapter 3 Device Management