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Installation Manual
H3C S5500-EI Series Ethernet Switches
Chapter 5 Boot ROM and Host Software Loading
5-3
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 the 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 BootROM software
1)
At the prompt "Enter your choice(0-9):" select
6
in the Boot Menu and then press
Enter
to enter the Boot ROM 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):
2) Select
3
in the above menu to load the Boot ROM and host software using
XModem protocol. The system displays the following download baud rate setting
menu:
Please select your download baudrate:
1.* 9600
2. 19200