HP Switch Services Modules - HP SECBLADEII-CMW520-F3171P05 Release Notes

HP SECBLADEII-CMW520-F3171P05

Release Notes

Hewlett-Packard Development Company, L.P.

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.

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 Available>-------------------|

| <1> 9600(Default) * |

| <2> 19200 |

| <3> 38400 |

| <4> 57600 |

| <5> 115200 |