H3C S7500 Series Ethernet Switches Installation Manual

Installation Manual
H3C S7500 Series Ethernet Switches Chapter 7 Software Maintenance
7-4
For Boot ROM upgrade, see section 7.6 "Loading Host Software Containing the Boot
ROM File” on page
7-19.
7.2.2 Loading Software from the Console Port Using Xmodem
I. Introduction to Xmodem
The Xmodem protocol is a file transfer protocol widely applied due to its simplicity and
performances. Xmodem transfers files through the console port. It supports 128-byte or
1-kilobyte packets, checksum, CRC, and retransmissions (generally 10 times) in case
of packet errors.
XModem transmission works through a receiving program and sending program. The
receiving program first sends a negotiation character requesting for a check method.
The sending program starts data packet transmission if the negotiation succeeds. After
receiving a complete packet, the receiving program checks the packet using the
negotiated check method. If the check succeeds, the receiving program sends a
positive acknowledgement character and the sending program continues to send the
next packet. If the check fails, the receiving program sends a negative
acknowledgement character and the sending program retransmits the packet.
II. Updating the Boot ROM
Follow these steps to update the Boot ROM:
1) After “Enter you choice(0-5)” is prompted in the Boot Menu, press Ctrl+U and
Enter to enter the Boot ROM update menu:
SRPG 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):3
You can select different protocols to update the Boot ROM.
2) Select 3 to update the Boot ROM program using XModem. Press Enter and then
select the file to be loaded.
Load File name :BTM530.btm
3) Press Enter to enter the download baudrate menu.
Please select your download baudrate:
1. 9600
2. 19200
3. 38400
4. 57600
5. 115200
0. Exit