VG2000/3000系列修改自带的MAC地址的方法

在启动过程中（提示ctrl+b之前），按下ctrl+t，即可进入修改MAC地址菜单。完整的过程如下：

  ***********************************************
  *                                             *
  *   H3C Voice Gateway BOOTROM, Version 1.12   *
  *                                             *
  ***********************************************
  Copyright(c) 2004-2007 Hangzhou H3C Technologies Co., Ltd.
  Creation date   : Apr 18 2007, 18:22:11.
  Testing memory...OK!
  64M    bytes  SDRAM
  8192k  bytes  Flash Memory
  Hardware Version is MTR 4.0
  CPLD     Version is CPLD 3.0
  Bootrom  Version is 1.12
     J: mac address set
     K: mac address get
     0: exit and reboot

  Please Select Item To Test:
         Please input a legal command

  Please Select Item To Test: K
         the mac address in bootrom is not exist, test fail
         the mac address in flash is not exist, test fail

  Please Select Item To Test: J
         please input mac address(in HEX):00-e0-fc-00-00-05
         writting mac address, please wait...
         mac address write bootrom success
         mac address write flash success

  Please Select Item To Test: K
         the mac address in bootrom is: 00-E0-FC-00-00-05
         the mac address in flash is: 00-E0-FC-00-00-05

  Please Select Item To Test: 0
         You have chosen to quit the test.
         The system will reboot!