关于C2811进入系统使用reload命令重启之后不进入系统而是进入ROM模式解决办法：
在ROM模式下使用TFTP协议传输方式重新装系统可以解决（实验过3次都可解决）方式如下：
在电脑架TFTP服务器，打开Tftp32.exe,点击“浏览”选择需要装入的系统IOS，电脑要设置静态IP。
Cisco思科2811重启不自动引导进入系统解决办法
IP_ADDRESS: 192.168.1.111
IP_SUBNET_MASK: 255.255.255.0
DEFAULT_GATEWAY: 192.168.1.1
TFTP_SERVER: 192.168.1.110
TFTP_FILE: c2800nm-advipservicesk9-mz.124-8a.bin
TFTP_VERBOSE: Progress
TFTP_RETRY_COUNT: 18
TFTP_TIMEOUT: 7200
TFTP_CHECKSUM: Yes
TFTP_MACADDR: 00:25:84:5e:55:38
FE_PORT: Fast Ethernet 0
FE_SPEED_MODE: Auto
Cisco思科2811重启不自动引导进入系统解决办法
Invoke this command for disaster recovery only.
WARNING: all existing data in all partitions on flash: will be lost!
Do you wish to continue? y/n: [n]: y /输入y，回车
Receiving c2800nm-advipservicesk9-mz.124-8a.bin from 192.168.1.110 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
File reception completed.
Copying file c2800nm-advipservicreesk9-mz.124-8a.bin to flash.
Erasing flash at 0x61fc0000
program flash location 0x60b50000 这一步等待的时间较长。