Cisco IOS軟件中備份和升級

2019-11-05 01:02:45

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　　備份和升級是兩個方向相反的過程。依照通常的約定，備份是指從網(wǎng)絡設備向TFTP服務器中復制軟件，而升級是指從TFTP服務器向網(wǎng)絡設備復制軟件。本文通過實驗演示對Cisco路由器的IOS軟件映像文件進行備份和升級。

首先啟動Cisco TFTP Server，并把TFTP server root指定到目錄"D:LCCNA LAB/IOS"下，保持其開啟狀態(tài)。

Router#sh Flash

System flash Directory:

File Length Name/status

1 c2501-d-1,121-8a.mz

[4289668 bytes used, 4098940 available, 8388608 total]

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

Router#copy flash tftp

Source filename []? c2500-d-1.121-8a.mz

Address or name of remote host []? 172.16.162.58

Destination filename [c2500-d-1.121-8a.mz]? (按回車鍵確認)

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

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

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

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

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

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

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

4289602 bytes copied m 62.320 secs (69187 bytes/sec)

Router#

Router#copy tftp flash

Address or name of remote host []? 172.16.16258

Source filename []? c2500-d-1.121-8a.mz

Destination filename [c2500-d-1.121-8a.mz]? (按回車鍵確認)

%Waming:There is a file already existing with this name

Do you want to over write? [confirm] (按回車鍵確認)

accessing tftp://172.16.162.58/c2500-d-1.121-8a.mz...

Erase flash: befeor copying?[confirm] (按回車鍵確認)

Erasing the flash filesystem will remove all files! Continue? [confirm] (按回車鍵確認)

Erasing.device...eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee...erased

Erase of flash:complete

Loading c2500-d-1.121-8a.mz from 172.16.162.58(via

Ethernet0):!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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

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

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

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

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

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

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

[OK-4289602/8579072bytes]

Verifying checksum,.. OK(OxC766)

4289602 bytes copied in 100.896secs(42896bytes/sec)

Router#reload

Proceed with reload? [confirm] (按回車鍵確認)

13:41:30: %SYS-5-RELOAD: Reload requested

System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE

Copyright (c) 1986-1995 by cisco Systems

(1)用sh flash命令查看flash中的IOS文件名，以便進行下一步操作。

(2)使用copy flash tftp命令從flash向TFTP服務器備份IOS軟件映像，根據(jù)提示依次鍵入源文件名(Flash中的IOS文件名)。TFTP服務器的
(3)用copy tftp flash向路由器中升級IOS軟件時，與備份時相似需要鍵入TFTP服務器名、源文件(TFTP服務器上的文件)名、目標文件名 (復制到Flash中的文件名)。

系統(tǒng)提示是否在拷貝之前將Flash中的文件系統(tǒng)刪除，按回車鍵確認后系統(tǒng)再次提示刪除操作將把Flash中的所有文件清除，問是否繼續(xù)，再次按回車鍵確認刪除操作。一系列的"e"表示正在進行刪除Flash上文件系統(tǒng)的操作。接下來是文件復制的進程，同樣以一系列的"!"來表示，"!"的數(shù)目越多表示文件越大。

最后系統(tǒng)對IOS文件進行了校驗，并確認傳輸沒有錯誤，IOS軟件升級操作即告完成。

IOS軟件升級完成后，需要重新啟動路由器，使得新軟件進入運行狀態(tài)。應該注重的是，IOS軟件的升級對存放在NVRAM中的啟動配置文件并不產生任何影響，路由器的啟動配置文件還是原來的文件。