Operation Manual – System Maintenance and DebuggingH3C S5600 Series Ethernet SwitchesChapter 1 Boot ROM and Host SoftwareLoading1-3Press Ctrl-B to enter Boot Menu...Press . The system displays:Password :Note:To enter the BOOT menu, you should press within five seconds (full startupmode) or one second (fast startup mode) after the information “Press Ctrl-B to enterBOOT Menu...” displays. Otherwise, the system starts to extract the program; and ifyou want to enter the BOOT Menu at this time, you will have to restart the switch.Enter 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 the
