I. introduction to xmodem, Ii. loading bootrom software – H3C Technologies H3C S3100 Series Switches User Manual
Page 575
Operation Manual – System Maintenance and Debugging
H3C S3100-52P Ethernet Switch
Chapter 1 BootROM and Host Software
Loading
1-3
Input the correct BootROM password (no password is need by default). The system
enters the Boot Menu:
BOOT MENU
1. Download application file to flash
2. Select application file to boot
3. Display all files in flash
4. Delete file from flash
5. Modify bootrom password
6. Enter bootrom upgrade menu
7. Skip current configuration file
8. Set bootrom password recovery
9. Set switch startup mode
0. Reboot
Enter your choice(0-9):
1.2.2 Loading Software Using XMODEM through Console Port
I. Introduction to XMODEM
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.
II. 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
Bootrom update menu:
1. Set TFTP protocol parameter
2. Set FTP protocol parameter