CISCO1760路由器IOS恢复！！

Cisco路由器一般将IOS存放在flash中，如果误操作将IOS删除或者是在升级的过程中掉电，或者其他什么原因导致路由器无法启动的话，都比较让人郁闷。
通常采用的方法就是通过tftp服务器或者是xmodem的方式重新升级IOS。
用tftp的方式当然快了，但有些时候可能tftp用不了。只能用xmodem的方式。
     下面就说说1760路由器的升级方式吧。

     路由器升级的时候一定要注意IOS所要求的最小内存和最小flash空间大小。只有你设备上的这些空间都大于等于IOS所需要的要求后，才能进行升级。什么？你不知道这个IOS到底需要多大内存和flash？只要是在cisco网站下载的，都可以查到。慢慢去查吧，不过得需要一定权限的CCO帐号。
  
      至少还能进的去监控模式吧。rommon 1 >

      输入“？”可以看到当前可以执行的所有命令，tftpdnld看到了吧。

     rommon 1 > tftpdnld ?

     可以看看这个命令后面有什么参数。
     最关键的是这个：
           IP_ADDRESS:
      IP_SUBNET_MASK:
     DEFAULT_GATEWAY:
         TFTP_SERVER:
           TFTP_FILE:
     IP_ADDRESS就是你路由器的IP地址了，TFTP_SERVER当然就是你tftp服务器的地址了。
     设置好这些参数后，在tftp服务器上ping一下路由器看看通了没有。通了就可以升级了。:taoy，不知道怎么设这些参数啊？
     唉……
    rommon 2 > IP_ADDRESS: 192.168.0.1
    rommon 3 > IP_SUBNET_MASK: 255.255.255.0
    rommon 4 > DEFAULT_GATEWAY: 192.168.0.2
    rommon 5 > TFTP_SERVER: 192.168.0.2
    rommon 6 > TFTP_FILE: c1700-sy-mz.122-8.YJ.bin

    设置好了就可以了。路由器的地址是192.168.0.1，tftp服务器的地址是192.168.0.2。IOS文件名是c1700-sy-mz.122-8.YJ.bin。

    下面就执行rommon 7 > tftpdnld
    好像得reset一下才可以。呵呵。
    rommon 1 > tftpdnld -r 执行这个命令吧，路由器会把IOS下载到DRAM中运行，等路由器启动以后再copy tftp flash 就OK了。其他的就不多数了。
rommon 8 > tftpdnld -r

          IP_ADDRESS: 192.168.0.1
      IP_SUBNET_MASK: 255.255.255.0
     DEFAULT_GATEWAY: 192.168.0.2
         TFTP_SERVER: 192.168.0.106
           TFTP_FILE: c1700-sy-mz.122-8.YJ.bin

Receiving c1700-sy-mz.122-8.YJ.bin from 192.168.0.12 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
File reception completed.
program load complete, entry point: 0x80008000, size: 0x5e5c5c
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) C1700 Software (C1700-SY-M), Version 12.2(8)YJ, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)
Synched to technology version 12.2(8.5)T
TAC Support: http://www.cisco.com/tac
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Fri 21-Jun-02 15:38 by ealyon
Image text-base: 0x80008124, data-base: 0x80B64A38

cisco 1760 (MPC860P) processor (revision 0x200) with 29492K/3276K bytes of memory.
Processor board ID VMS06220ECE (3058387693), with hardware revision BB67
MPC860P processor: part number 5, mask 2
Bridging software.
X.25 software, Version 3.0.0.
1 FastEthernet/IEEE 802.3 interface(s)
2 Serial(sync/async) network interface(s)
32K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read/Write)



Press RETURN to get started!