方法如下:
QUOTE:Router>en 进入新IOS的特权模式
Router#reload 重启系统
Proceed with reload? [confirm] 回车
00:01:04: %SYS-5-RELOAD: Reload requested
System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
TAC:Home:SW:IOS:Specials for info
PC = 0xfff0a530, Vector = 0x500, SP = 0x680127b0
C2600 platform with 24576 Kbytes of main memory
PC = 0xfff0a530, Vector = 0x500, SP = 0x80004684
monitor: command "boot" aborted due to user interrupt
30秒内按ctrl+break键
rommon 1 > confreg ( 输入“confreg”命令)
Configuration Summary
enabled are:
load rom after netboot fails
console baud: 115200
boot: image specified by the boot system commands
or default to: cisco2-C2600
do you wish to change the configuration? y/n [n]: y (选择 yes)
enable "diagnostic mode"? y/n [n]: n (选择 no)
enable "use nn IP bcast address"? y/n [n]: n (选择 no)
disable "load rom after netboot fails"? y/n [n]: n (选择 no)
enable "use all zero broadcast"? y/n [n]: n (选择 no)
enable "break/abort has effect"? y/n [n]: n (选择 no)
enable "ignore system config info"? y/n [n]: n (选择 no)
change console baud rate? y/n [n]: y (选择 yes)
enter rate: 0 = 9600, 1 = 4800, 2 = 1200, 3 = 2400
4 = 19200, 5 = 38400, 6 = 57600, 7 = 115200 [7]: 0 (选择 0,改回用标准速率速率9600的xmodem传输)
change the boot characteristics? y/n [n]: n (选择 no)
Configuration Summary
enabled are:
load rom after netboot fails
console baud: 9600
boot: image specified by the boot system commands
or default to: cisco2-C2600
do you wish to change the configuration? y/n [n]: n You must reset or power cycle for new config to take effect
rommon 2 >此时手工改回计算机串口与超级终端2者传输速率为9600
然后敲入
QUOTE:rommon 2 >reset最好关掉电源后,重新启动。利用xmodem命令实现路由器IOS升级速度较慢,往往等上很长时间,为了快速升级,可以采用下列方法。
(二)通过tftpdnld命令升级IOS,具体步骤如下:
1、用Cisco原配的线缆连接路由器的console口与PC机的COM1,使用PC机的超级终端软件访问路由器;用一根双绞线连接路由器的eth0/0口与PC机的网卡。
2、将路由器的eth0/0口IP地址设为10.32.10.32;PC机的IP地址设为10.32.10.1.将要升级的IOS映象文件拷贝到相关的目录中,并运行TFTP服务器软件,通过菜单设置Root目录为拷贝IOS映象文件所在目录。
3、通过set 命令查看配置参数
QUOTE:rommon 2 > set
PS1=rommon ! >
BOOT=
BSI=0
RET_2_RTS=
?=0 4、在 rommon 状态下输入:(注意大小写)
QUOTE:rommon 3 >IP_ADDRESS=10.32.10.1 (路由器的ip地址)
rommon 4 >IP_SUBNET_MASK=255.255.255.0 (路由器的掩码)
rommon 5 >DEFAULT_GATEWAY=10.32.10.32 (缺省网关,是pc机的ip地址)
rommon 6 >TFTP_SERVER=10.32.10.32 (是pc机的ip地址)
rommon 7 >TFTP_FILE=C2600-I-MZ.122-11.BIN (上传ios文件的名称)
rommon 8>sync (保存参数配置)
rommon 9 >set (查看)
rommon 10 > set
PS1=rommon ! >
BOOT=
IP_ADDRESS=10.32.10.1
IP_SUBNET_MASK=255.255.255.0
DEFAULT_GATEWAY=10.32.10.32
TFTP_SERVER=10.32.10.32
TFTP_FILE=C2600-I-MZ.122-11.BIN
BSI=0
RET_2_RTS=
?=0
rommon 11 >tftpdnld执行tftpdnld命令进行ios升级,有时可能会报错或命令不执行,这时只要用sync命令保存配置后,重新启动路由器(最好关掉电源再开机)后,再执行tftpdnld命令就可以了。
QUOTE:rommon 11 >tftpdnld(传送文件)出现提示选择y
IP_ADDRESS: 10.32.10.1
IP_SUBNET_MASK: 255.255.255.0
DEFAULT_GATEWAY: 10.32.10.32
TFTP_SERVER: 10.32.10.32
TFTP_FILE: C2600-I-MZ.122-11.BIN
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
Receiving C2600-I-MZ.122-11.BIN from 10.32.10.32!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
…
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
File reception completed.
Copying file C2600-I-MZ.122-11.BIN to flash.
Erasing flash at 0x607c0000
program flash location 0x605b0000
rommon 13 >
在rommon 13 >提示符下键入reset,或重新启动路由器(power-cycle),进入正常引导状态,即:
Router>笔者在Cisco2500、2600、7200等系列路由器上均实际操作过,以上为在Cisco2610路由器上实际操作捕获或截屏,所配地址只是特例,大家可根据实际需要予以修改。最后建议:大家在作正常路由器系统升级时,为防止不正确操作等引起的升级失败,请先把路由器原有的系统备份下来。
责任编辑:小草