Loading Software Using Xmodem Through Console Port - H3C LS-3100-16TP-EI-H3-A-O Installation Manual

Installation Manual
H3C S3100 Series Ethernet Switches
Input the correct Boot ROM password (by default, no password is set on the switch).
The system enters the 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):

5.2.2 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 error
packet retransmission mechanism (generally the maximum number of retransmission
attempts is ten).
The XModem transmission procedure is completed by the cooperation of a receiving
program and a sending program: The receiving program sends a negotiation packet to
negotiate a packet check 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 packet and the sending program proceeds to
send another packet; otherwise, the receiving program sends a negative
acknowledgement packet and the sending program retransmits the packet.
II. Loading Boot ROM software
Follow these steps to load the Boot ROM 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 Boot ROM update menu shown below:
Bootrom update menu:
1. Set TFTP protocol parameter
BOOT MENU
Chapter 5 Boot ROM and Host Software Loading
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