Loading Software Using Xmodem Through Console Port - H3C S5800-32F Installation Manual

Currently, Boot ROM files are not provided separately by the S5800 series; instead, they are stored
together with the application files with name extension .bin in the host software package.
The procedures for upgrading the Boot ROM program and loading application files are similar
except that you need to select different items (1 for loading application files, and 6 for loading Boot
ROM files) in the Boot ROM menu. This manual takes upgrading the Boot ROM program as
examples.

Loading Software Using XMODEM Through Console Port

Introduction to XMODEM
XMODEM is a file transfer protocol widely used for its simplicity. XMODEM transfers files through the
console port, supporting data packets of 128 bytes. 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.
Upgrading the Boot ROM program
Complete the following tasks to update the Boot ROM program using XMODEM through the console
port (For details about the HyperTerminal, refer to
Enter the Boot ROM update menu on the switch
Enter the protocol parameter setting menu
Configure the switch to download files using
XMODEM
Set the download rate of the console port on the
switch
Change the rate of the serial port on the terminal
Upload an application file from the terminal to
the switch
Task
Setting Terminal Parameters
Required
Log in to the switch through the HyperTerminal
and then configure the protocol used for loading
files.
Required
Log in to the switch through the HyperTerminal
and then set the download rate of the console
port on the switch.
Optional
Set the baud rate of the serial port on the terminal
to be consistent with that of the console port on
the switch so as to establish a connection
between the terminal and the switch using the
changed rate.
Required
Transmit a file from the terminal to the switch.
5-4
on page 4-2):
Remarks