3com S7906E Guide D’Installation Rapide

6-6

Attaching network interf

Prepare for loading...OK!

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.......................done!

Free flash Space : 65932288 bytes

Writing flash.....................................................................

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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):

After the above steps, you have completed the downloading of the host software package.

To complete the host software upgrade, you need to set the main/backup attribute of the host software.

” on page

If you need to upgrade the Boot ROM on the SRPUs through the boot menu, refer to section “

” on page

Downloading Through the Console Port Using XMODEM

Introduction to XMODEM

The XMODEM protocol is a file transfer protocol widely used due to its simplicity and good performance.

XMODEM transfers files through the console port, supporting data packets of 128 bytes and 1 KB. With

respect to reliability, XMODEM supports checksum, CRC, and error packet retransmission mechanism.

Normally, the maximum number of transmission attempts is 10.

XMODEM transmission is completed by the receiving and sending program. The receiving program

initiates packet checking method negotiation by sending the negotiation character. After negotiation, the

sending program starts packet transmission. Upon the receipt of a complete packet, the receiving

program checks it using the negotiated checking method. If the check succeeds, the receiving program

sends an acknowledgement character; if the check fails, it sends a negative acknowledgement

character. Upon the receipt of an acknowledgement, the sending program continues to send the next

packet; upon the receipt of a negative acknowledgement, it retransmits the packet.