Operation Manual – System Maintenance and DebuggingH3C S3100 Series Ethernet SwitchesChapter 1 Boot ROM and Host SoftwareLoading1-3Enter the correct Boot ROM password (no password is set by default). The systementers the BOOT Menu:BOOT MENU1. Download application file to flash2. Select application file to boot3. Display all files in flash4. Delete file from flash5. Modify bootrom password6. Enter bootrom upgrade menu7. Skip current configuration file8. Set bootrom password recovery9. Set switch startup mode0. RebootEnter your choice(0-9):1.2.2 Loading by XModem through Console PortI. Introduction to XModemXModem protocol is a file transfer protocol that is widely used due to its simplicity andhigh stability. The XModem protocol transfers files through Console port. It supportstwo types of data packets (128 bytes and 1 KB), two check methods (checksum andCRC), and multiple attempts of error packet retransmission (generally the maximumnumber of retransmission attempts is ten).The XModem transmission procedure is completed by a receiving program and asending program. The receiving program sends negotiation characters to negotiate apacket checking method. After the negotiation, the sending program starts to transmitdata packets. When receiving a complete packet, the receiving program checks thepacket using the agreed method. If the check succeeds, the receiving program sendsacknowledgement characters and the sending program proceeds to send anotherpacket. If the check fails, the receiving program sends negative acknowledgementcharacters and the sending program retransmits the packet.II. Loading Boot ROMFollow these steps to load the Boot ROM:Step 1: At the prompt "Enter your choice(0-9):" in the BOOT Menu, press <6> or, and then press to enter the Boot ROM update menu shown below:Bootrom update menu:1. Set TFTP protocol parameter2. Set FTP protocol parameter
