利用Xmodem升级2610IOS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 　　te to up　　2610_2>