HP Security Modules Software Upgrade Guide-6PW103

Upgrading the BootWare Program and

Applications Through the Serial Interface

NOTE:

The Security modules for the 5800 series switches do not support up

radin

the BootWare pro

ram 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.

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. |

|--------------------<Baudrate Avaliable>-------------------|

| <1> 9600(Default) * |

| <2> 19200 |

| <3> 38400 |

| <4> 57600 |

| <5> 115200 |

| <0> Exit |

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