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实验8:路由器IOS升级2

时间:2017-12-09 19:37:44      阅读:231      评论:0      收藏:0      [点我收藏+]

标签:unalias   文件备份   remote   files   串口   5.6   系统升级   只读   produce   

 

IOS 升级
在介绍CISCO路由器IOS升级方法前,有必要对Cisco路由器的存储器的相关知识作以简单介绍。路由器与计算机相似,它也有内存和操作系统。在Cisco路由器中,其操作系统叫做互连网操作系统(Internetwork Operating System),常简称为IOS。路由器的存储器主要有:
ROM:只读存储器包含路由器正在使用的IOS的一份副本;
RAM:IOS将随机访问存储器分成共享和主存。主要用来存储运行中的路由器配置和与路由协议有关的IOS数据结构;
FLASH (闪存):用来存储IOS软件映像文件,闪存是可以擦除内存,它能够用IOS的新版本




覆写,IOS升级主要是闪存中的IOS映像文件进行更换。
NVRAM:非易失性随机访问存储器,用来存储系统的配置文件。

IOS升级方法一

在对能够正常启动的CISCO路由器的IOS进行升级时,比较简单。具体步骤如下:

1、寻找一种TFTP服务器软件(有CISCO公司的TFTPServer或3COM公司的3Cserver等,在升级较大IOS映象文件时,建议用3Cserver),安装在一台计算机上,将要升级的IOS映象文件拷贝到相关的目录中(例:D:\),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(如D:\)。假设该计算机的IP地址为10.32.10.1;

2、连接路由器的console口与PC机的COM1,使用PC的超级终端软件访问路由器,将路由器的地址设为10.32.10.32(与计算机的IP地址同网段即可)。建议在进行IOS升级前将原有IOS文件备份下来,防止待升级的IOS文件存在问题不可用;


QUOTE:
    Router# dir flash:     (查看目前IOS映象文件名,也可用Router#Show version)

    Directory of flash:/

    1   -rw-     5998292             C2600-I-MZ.122-11.BIN

    8388608 bytes total (2390252 bytes free)

    Router#copy flash tftp          (备份IOS文件)

    Source filename []?c2600-i-mz.122-11.bin

    Address or name of remote host []? 10.32.10.1 (TFTP服务器地址)

    Destination filename [c2600-i-mz.122-11.bin]?

    !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    …

    !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    5998292 bytes copied in 324.071 secs (18509 bytes/sec)

    Router#
3、对路由器进行IOS升级;

QUOTE:
    Router#copy tftp flash

    Address or name of remote host []? 10.32.10.1    (TFTP服务器地址)

    Source filename []? c2600-i-mz.122-11.bin       (需升级的新IOS映象文件名)

    Destination filename [c2600-i-mz.122-11.bin]?

    Do you want to over write? [confirm]

    Accessing tftp://10.32.10.1/c2600-i-mz.122-11.bin...

    Erase flash: before copying? [confirm]

    Erasing the flash filesystem will remove all files! Continue? [confirm]

    Erasing device... eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee ...erasedee

    Erase of flash: complete

    Loading c2600-i-mz.122-11.bin from 10.32.10.1 (via Ethernet0/0): !!!!!!!!!!!!!!

    !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    …

    !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    [OK - 5998292 bytes]

    Verifying checksum...   OK (0xA0C0)

    5998292 bytes copied in 318.282 secs (18846 bytes/sec)

    Router#
IOS升级方法二

由于升级失败后或者路由器的config-register寄存器值为0x2101时,开启路由器时、或者在开启(某些型号)Cisco路由器的电源开关后30秒内按下Ctrl+break键,中断路由器的正常启动,路由器都会进入rom监视模式,即Router(boot)>,在这种情形下,对路由器的IOS进行升级,也比较简单。首先进入特权模式下,即

QUOTE:
Router(boot)>en

    Router(boot)#
其他升级步骤同方法一,即:执行copy tftp flash命令,对IOS进行升级。升级完成后,不要忘了修改config-register寄存器值为0x2102(恢复正常值)。

QUOTE:
    Router(boot)# t

    Router(boot)( config)# config-register 0x2102

    Router(boot)( config)#exit

    Router(boot)#wr

    Router(boot)#reload   
重启即可。
IOS升级方法三

由于不小心使用了命令erase flash或升级失败后或在开启(某些型号)Cisco路由器的电源开关后30秒内按下Ctrl+break键,中断路由器的正常启动,路由器都会进入rom监视模式,即 rommon 1>,在这种情形下,对路由器的IOS进行升级,情况要稍微复杂一点。在rommon 1>状态下,可键?请求帮助。(1为命令行序号,每执行1条命令自动加1)


QUOTE:
rommon 1 > ?

    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

    rommon 2 >
在rommon 1>状态下有两种升级IOS方法。

(一)、通过Xmodem命令(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)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,这时不需要对PC和路由器配置任何地址。

2、在这个模式下,输入Xmodem命令,即:


QUOTE:
    rommon 2 > xmodem -c c2600-i-mz.122-11.bin

    (-c是带校验,c2600-i-mz.122-11.bin为存放在PC机上的IOS映像文件)

    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 c2600-i-mz.122-11.bin ...    (此时在超级终端的传送栏目=> 选择发送文件选项 => 再选择Xmodem 并指明IOS映像文件所在的路径,按发送即开始上传IOS,等待时间很长,视IOS的大小和传输速度。)


QUOTE:
Erasing flash at 0x607c0000

    program flash location 0x605b0000

    Download Complete!
传完以后,对整个系统初始化 显示如下:


QUOTE:
    program load complete, entry point: 0x80008000, size: 0x5b85e0

    Self decompressing the image : #################################################

    ################################################# [OK]

    Smart Init is disabled. IOMEM set to: 10

    Using iomem percentage: 10

    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 12.2(11)T9,   RELEASE SOFTWARE (fc1)

    TAC Support: http://www.cisco.com/tac

    Copyright (c) 1986-2003 by cisco Systems, Inc.

    Compiled Mon 23-Jun-03 15:42 by cmong

    Image text-base: 0x8000809C, data-base: 0x80A68B48

    cisco 2610 (MPC860) processor (revision 0x203) with 22528K/2048K bytes of memory

    Processor board ID JAD03483395 (1128032249)

    M860 processor: part number 0, mask 49

    Bridging software.

    X.25 software, Version 3.0.0.

    1 Ethernet/IEEE 802.3 interface(s)

    2 Serial(sync/async) network interface(s)

    32K bytes of non-volatile configuration memory.

    8192K bytes of processor board System flash (Read/Write)

    Press RETURN to get started!

    *Mar   1 00:00:05.652: %PA-2-UNDEFPA: Undefined Port Adaptor type 100 in bay 1

    *Mar   1 00:00:07.996: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up

    *Mar   1 00:00:07.996: %LINK-3-UPDOWN: Interface Serial0/0, changed state to down

    *Mar   1 00:00:07.996: %LINK-3-UPDOWN: Interface Serial0/1, changed state to down

    *Mar   1 00:00:09.142: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0, changed state to up

    *Mar   1 00:00:09.142: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down

    *Mar   1 00:00:09.142: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state to down

    *Mar   1 00:00:09.458: %SYS-5-CONFIG_I: Configured from memory by console

    *Mar   1 00:00:11.245: %LINK-5-CHANGED: Interface Serial0/1, changed state to administratively down

    *Mar   1 00:00:12.275: %SYS-5-RESTART: System restarted --Cisco Internetwork Operating System Software

    IOS (tm) C2600 Software (C2600-I-M), Version 12.2(11)T9,   RELEASE SOFTWARE (fc1)

    TAC Support: http://www.cisco.com/tac

Copyright (c) 1986-2003 by cisco Systems, Inc.

    Compiled Mon 23-Jun-03 15:42 by cmong

    *Mar   1 00:00:12.279: %SNMP-5-COLDSTART: SNMP agent on host NE16 is undergoing a cold start

Router>
采用这种方法时,由于使用console口来传送,速率为9600bps,需要时间较长。因此可修改console口速率利用xmodem命令实现快速升级IOS。具体方法如下:


QUOTE:
rommon 1 > confreg 回车

    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]: y (选择 yes)

    enable "diagnostic mode"? y/n [n]: n (选择 no)

    enable "use net in 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 [0]: 7 (选择 7,用最大的11520

    速率的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: 115200

    boot: image specified by the boot system commands

    or default to: cisco2-C2600

    do you wish to change the configuration? y/n [n]: n (选择 no)

    You must reset or power cycle for new config to take effect

    rommon 2 > reset 回车
注意:在按reset键前,需要修改串口速度(我的电脑---端口属性----串口速度调为115200),然后再修改超级终端里设置速率为115200,记住,一定要这么做,否则会出现乱码! 然后关闭这个超级终端,重新建立一个超级终端连接,重新启动系统后,出现


QUOTE:
rommon 1> 提示符
然后,输入


QUOTE:
    rommon 1> xmodem -r

    Do not start the sending program yet...

    Invoke this application only for disaster recovery.

    Do you wish to continue? y/n [n]: y (选择 yes)

    Ready to receive file ...
此时,在超级终端的菜单上的“传送”---“发送文件”----选择IOS映像文件所在地以及选择使用“xmodem”协议,点击“发送”即可。等待10-20分钟左右就可升级完3-6M的IOS文件!待升级完成后,请记住修改回计算机串口与超级终端、路由器confreg下的xmodem等传输速率为9600bps。

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。

实验8:路由器IOS升级2

标签:unalias   文件备份   remote   files   串口   5.6   系统升级   只读   produce   

原文地址:http://www.cnblogs.com/zhongguiyao/p/8012264.html

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