IOS被误删除后的恢复介绍

来源:思科认证    发布时间:2012-11-09    思科认证视频    评论

    通过Xmodem升级2610的IOS实例
    如果你不小心使用了命令erase flash 那么发生什么就可想而知了。因此,建议在你拿到路由器等网络设备时 最好先将它的IOS等操作系统备份出来,以备万一!
    本篇主要介绍通过Xmodem上传IOS的过程(以2610为例,不过这个方法用在其他设备上没什么太大区别)
    准备工作,只要有Cisco原配的线缆就可以(注:Xmodem与实际的modem没有任何联系 只是一个传输协议 数据是通过终端的串口和路由器的Console口灌进去的)
    在没有IOS的情况下 系统只能进入Rommon状态,在这个状态下只能见到如下命令:
    rommon 8 > ?
    alias set and display aliases command
    boot boot up an external process
    break set/show/clear the breakpoint
    confreg configuration register utility
    cont continue executing a downloaded image
    context display the context of a loaded image
    cookie display contents of cookie PROM in hex
    dev list the device table
    dir list files in file system
    dis display instruction stream
    dnld serial download a program module
    frame print out a selected stack frame
    help monitor builtin command help
    history monitor command history
    meminfo main memory information
    repeat repeat a monitor command
    reset system reset
    set display the monitor variables
    stack produce a stack trace
    sync write monitor environment to NVRAM
    sysret print out info from last system return
    tftpdnld tftp image download
    unalias unset an alias
    unset unset a monitor variable
    xmodem x/ymodem image download
    在这个模式下,输入Xmodem
    rommon 9 > xmodem
    会提示如下警告:
    WARNING: All existing data in bootflash will be lost!
    Invoke this application only for disaster recovery.
    Do you wish to continue? y/n [n]: y
    Ready to receive file ? …
    然后在超级终端的传送栏目=> 选择发送选项 => 再选择Xmodem 并指明IOS所在的路径即开始上传IOS,等待时间很长,视IOS的大小和传输速度。对于初次做IOS上传,建议不要去修改什么传输速率。传完以后 对整个系统初始化 界面如下:
    Erasing flash at 0x603c0000
    program flash location 0x602f0000
    Download Complete!
    program load complete, entry point: 0x80008000, size: 0x2f0074
    Self decompressing the image : #################################################
    ################################################################################
    ################################################################################
    ################################################################# [OK]
    Restricted Rights Legend
    Use, duplication, or disclosure by the Government is
    subject to restrictions as set forth in subparagraph
    (c) of the Commercial Computer Software - Restricted
    Rights clause at FAR sec. 52.227-19 and subparagraph
    (c) (1) (ii) of the Rights in Technical Data and Computer
    Software clause at DFARS sec. 252.227-7013.
    Cisco Systems, Inc.
    170 West Tasman Drive
    San Jose, California 95134-1706
    Cisco Internetwork Operating System Software
    IOS (tm) C2600 Software (C2600-I-M), Version 11.3(6)T, RELEASE SOFTWARE (fc1)
    Copyright (c) 1986-1998 by Cisco Systems, Inc.
    Compiled Tue 06-Oct-98 18:42 by ccai
    Image text-base: 0x80008084, data-base: 0x80554578
    Cisco 2610 (MPC860) processor (revision 0x202) with 12288K/4096K bytes of memory
    .
    Processor board ID JAB0233005Z (3677578902)
    M860 processor: part number 0, mask 32
    Bridging software.
    X.25 software, Version 3.0.0.
    1 Ethernet/IEEE 802.3 interface(s)
    1 Serial network interface(s)
    32K bytes of non-volatile configuration memory.
    4096K bytes of processor board System flash (Read/Write)
    Press RETURN to get started!
    00:00:06: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up
    00:00:06: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up
    00:00:06: %SYS-5-CONFIG_I: Configured from memory by console
    00:00:06: %SYS-5-RESTART: System restarted --
    Cisco Internetwork Operating System Software
    IOS (tm) C2600 Software (C2600-I-M), Version 11.3(6)T, RELEASE SOFTWARE (fc1)
    Copyright (c) 1986-1998 by Cisco Systems, Inc.
    Compiled Tue 06-Oct-98 18:42 by ccai
    00:00:07: %LINEPROTO-5-UPDOWN: Line protocol on
    WL_bank_2610_2>Interface Ethernet0/0, changed state to up
    00:00:07: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed sta
    te to up
    00:00:07: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed sta

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