当时是启动就进入了rommon模式，因为系统找不到引导文件，无法配置confreg 0x2102 / confreg 0x2142

只能通过以下步骤完成 rommon 1 >confreg Configuration Summary : => load rom after netboot fails => console baud: 9600 => autoboot from: commands specified in 'BOOT' environment variable do you wish to change the configuration? y/n [n]: y enable "diagnostic mode"? y/n [n]: y enable "use net in IP bcast address"? y/n [n]: n disable "load rom after netboot fails"? y/n [n]: y enable "use all zero broadcast"? y/n [n]: n enable "break/abort has effect"? y/n [n]: n enable "ignore system config info"? y/n [n]: n change console baud rate? y/n [n]: n change the boot characteristics? y/n [n]: y enter to boot: 0 = disable autoboot 1 = the first file from internal flash device 2 = commands specified in 'BOOT' environment variable [2]: 1 Configuration Summary : => diagnostic mode => console baud: 9600 => autoboot from: the first file from internal flash device do you wish to save this configuration? y/n [n]: y You must reset or power cycle for new configuration to take effect