Cisco 2611 ROMMON模式升级和恢复IOS

1、今天找来一台cisco2600想做个实验。本来想先把老的配置保存，没想到我竟然误把ios给删除了。实在找不到2610的ISO了，结果用2620灌的，可以正常使用。r7#copy startup-config x.cfgDestination filename x.cfg?Erase flash: before copying? confirmnVerifying checksum. OK (0x1376)1248 bytes copied in 0.232 secsr7#dirDirectory of flash:/    1 -rw-  &#

2、160;  4467540              <no date> c2600-c-mz.121-9.bin    2 -rw-        1248                

3、; <no date> x.cfg8388608 bytes total (3919692 bytes free)注意看红色字体，这是我恢复ios后的保存startup-config的步骤。因为当时没注意，直接回车了，造成ios被删除 ,正确的方法是 输入"n”，切记啊！恢复开始，首先找个12.1的ios，网址： 将路由器eth0口与笔记本用交叉线连接，通过concle口登录路由器，设置tftp的环境rommon 1 >IP_ADDRESS=        

4、;         /默认为路由器第一个以太网接口的iprommon 2 >IP_SUBNET_MASK=    /设置路由器以太网接口的子网掩码rommon 3 >DEFAULT_GATEWAY=    /设置网关，否则tftp无法成功rommon 4 >TFTP_SERVER=04      &#

5、160;    /设置笔记本ip，即为tftp server的iprommon 5 >TFTP_FILE=c2600-c-mz.121-9.bin     /设置路由器要下载的ios文件名rommon 6 > set                         &

6、#160;     /设置tftp完环境后，可以用set命令再检查一下，也可以略过PS1=rommon ! >RET_2_RTS=IP_ADDRESS=IP_SUBNET_MASK=DEFAULT_GATEWAY=TFTP_SERVER=04TFTP_FILE=c2600-c-mz.121-9.binrommon 7 > tftpdnld         

7、;             /核对无误后，开始tftp          IP_ADDRESS:       IP_SUBNET_MASK:      DEFAULT_GATEWAY:    

8、0;     TFTP_SERVER: 04           TFTP_FILE: c2600-c-mz.121-9.binInvoke this command for disaster recovery only.WARNING: all existing # in all partitions on flash will be lost!Do you wish to continue? y/n: n: yReceiving

9、c2600-c-mz.121-9.bin from 04!File reception completed.Copying file c2600-c-mz.121-9.bin to flash.Erasing flash at 0x607c0000program flash location 0x60120000rommon 8 > confreg                   /下

10、载ios完毕后，还需设置寄存器的值      Configuration Summaryenabled are:load rom after netboot failsconsole baud: 9600boot: image specified by the boot system commands      or default to: cisco2-C2600do you wish to change the configuration? y/n n: y   

11、;   /要选择“y”enable "diagnostic mode"? y/n n: nenable "use net in IP bcast address"? y/n n: ndisable "load rom after netboot fails"? y/n n: nenable "use all zero broadcast"? y/n n: nenable "break/abort has effect"? y/n n: nenable "ignore

12、 system config info"? y/n n: nchange console baud rate? y/n n: nchange the boot characteristics? y/n n: y      /要选择“y”enter to boot:0 = ROM Monitor1 = the boot helper image2-15 = boot system    2:2         

13、0;                 /要选择“2”    Configuration Summaryenabled are:load rom after netboot failsconsole baud: 9600boot: image specified by the boot system commands      or default to: cisco2-C2600do you w