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Installation Manual
H3C S3610 Series Ethernet Switches
8. Set bootrom password recovery
9. Set switch startup mode
0. Reboot
Enter your choice(0-9):
5.2.2 Loading Software from Console Port Using XMODEM
I. Introduction to XMODEM
XMODEM is a file transfer protocol widely used for its simplicity and good performance.
XMODEM transfers files through the console port, supporting data packets of 128 bytes
and 1 KB. With respect to reliability, it supports checksum, CRC, and the error packet
retransmission mechanism. Normally, the maximum number of retransmission
attempts is ten.
XMODEM transfer is completed by receiving and sending programs together.
Receiving program initiates packet checking method negotiation by sending the
negotiation character. If negotiation passes, the sending program starts packet transfer.
Upon receipt of a complete packet, the receiving program checks it using the
agreed-upon check method. If the check succeeds, the receiving program sends an
acknowledgement character; if the check fails, it sends a reject character. Upon receipt
of the acknowledgement, the sending program continues to send the next packet; upon
receipt of the reject, it retransmits the packet.
II. Loading Boot ROM
Follow these steps to download the Boot ROM program:
Step 1: Enter <6> or <Ctrl + U> in the Boot Menu to access the Boot ROM loading
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 loading menu to download through XMODEM. The system
displays the following download speed setting menu:
Please select your download baudrate:
1.* 9600
2. 19200
3. 38400
4. 57600
5. 115200
Chapter 5 Loading Boot ROM and Host Software
5-3
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