H3C Technologies H3C SecBlade SSL VPN Cards - Manual (Page 30)

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Table 13 Storage device operation submenu
Submenu item Description
<1> Display All Available
Nonvolatile Storage Device(s)
Display all available storage devices.
<2> Set The Operating Device Configure the current operating device.
<3> Set The Default Boot Device Set the default boot device.
<0> Exit To Main Menu Return to the main menu.
Upgrading the BootWare Program and
Applications Through the Serial Interface
NOTE:
The SecBlade cards for the S5800 series switches do not support upgrading the BootWare program and
applications through the serial interface.
Introduction to Xmodem
You need to use the Xmodem protocol when upgrading the BootWare program and applications through
the serial interface (console interface).
Xmodem is a file transfer protocol widely used for its simplicity and good performance. Modem transfers
files through serial interfaces. It supports transmission of packets in 128 bytes and 1024 bytes, error
check (checksum and CRC), and error retransmission (generally the maximum number of retransmission
attempts is 10).
XModem transmission is completed by the cooperation of a receiver and a sender. The receiver sends a
negotiation message to the sender to negotiate an error check method. After the negotiation, the sender
starts to transmit data packets. After a complete packet is received, the receiver checks the packet using
the agreed method.
• If the check is passed, the receiver sends an acknowledgement message to the sender. Upon
receiving the message, the sender continues to send the next packet.
• If the check fails, the receiver sends a negative acknowledgement message to the sender. Upon
receiving the message, the sender retransmits the packet.
Modifying Serial Interface Parameters
In practice, on the one hand, you need to improve the baud rate of the serial interface to save the
upgrade time, and on the other hand, you need to lower it to guarantee the transmission reliability. This
section introduces how to modify the baud rate of the serial interface.
1. Select 2 on the main menu to enter the serial submenu.
2. Select 5 on the serial submenu to enter the baud rate setting menu as follows:
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|Note:'*'indicates the current baudrate |