交换机在Boot模式下如如何将波特率设置为115200？

使用console传输文件的？不然不涉及到这个问题。如果是通过Console口利用Xmodem升级启动文件，选下面的<5> Modify Serial Interface Parameter 

A.1.1 通过Console口利用Xmodem升级启动文件

(1)       通过Console口升级启动文件，在BootWare主菜单下键入<2>，就会进入串口子菜单，菜单内容如下：

==========================<Enter Serial SubMenu>===========================   

|Note:the operating device is flash                                        |   

|<1> Download Image Program To SDRAM And Run                               |   

|<2> Update Main Image File                                                |   

|<3> Update Backup Image File                                              |   

|<4> Download Files(*.*)                                                   |   

|<5> Modify Serial Interface Parameter                                     |   

|<0> Exit To Main Menu                                                     |   

============================================================================   

Enter your choice(0-5):

(2)       在串口子菜单中，键入<5>，系统会提示修改串口波特率：

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

|Note:'*'indicates the current baudrate                                    |

|     Change The HyperTerminal's Baudrate Accordingly                      |

|---------------------------<Baudrate Available>---------------------------|

|<1> 9600(Default)*                                                        |

|<2> 19200                                                                 |

|<3> 38400                                                                 |

|<4> 57600                                                                 |

|<5> 115200                                                                |

|<0> Exit                                                                  |

============================================================================

Enter your choice(0-5):5

根据实际情况，选择合适的下载波特率，若如上所示键入<5>，即选择115200bps，终端显示提示信息：

Baudrate has been changed to 115200 bps.

Please change the terminal's baudrate to 115200 bps, press ENTER when ready.