Installation ManualH3C S3600 Series Ethernet Switches Chapter 5 Loading Boot ROM and Host Software5-6Note:To access the Boot Menu, press within one seconds after the information“Press Ctrl-B to enter Boot Menu...” appears; otherwise the system starts todecompress the program. At this time if you want to access the Boot Menu, you need torestart the switch.Input the correct Boot ROM password (no password is set by default). The systementers the following 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):5.3.2 Loading Software from Console Port Using XModemI. Introduction to XModemXModem is a file transfer protocol widely used for its simplicity and good performance.XModem transfers files through the Console port, supporting data packets of 128 bytesand 1 KB. With respect to reliability, it supports checksum, CRC, and the error packetretransmission mechanism. Normally, the maximum number of retransmissionattempts is ten.XModem transfer is completed by receiving and sending programs together. Receivingprogram initiates packet checking method negotiation by sending the negotiationcharacter. If negotiation passes, the sending program starts packet transfer. Uponreceipt of a complete packet, the receiving program checks it using the agreed-uponcheck method. If the check succeeds, the receiving program sends anacknowledgement character; if the check fails, it sends a reject character. Upon receiptof the acknowledgement, the sending program continues to send the next packet; uponreceipt of the reject, it retransmits the packet.
