Release notes - H3C SECBLADENSM-CMW520-R3106

| <0> Exit To Main Menu |

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Enter your choice(0-3):

Table 15 describes the storage device operation submenu items.

Table 15 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

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.

l 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.

l 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.

Step1 Select 2 on the main menu to enter the serial submenu.

Step2 Select 5 on the serial submenu to enter the baud rate setting menu as follows:

========================<BAUDRATE SET>=======================

|Note:'*'indicates the current baudrate |

| Change The HyperTerminal's Baudrate Accordingly |

| Press 'Enter' to exit with things untouched. |