实验配置一：备份和还原交换机IOS
1：建立交换机和TFTP服务器的通信
sw1(config)#hostnameSW1
SW1(config)#interfacevlan 1
SW1(config-if)#ipaddress 192.168.1.1 255.255.255.0
SW1(config-if)#noshutdown
测试交换机与TFTP服务器之间的通信：
SW1#ping192.168.1.2
Typeescape sequence to abort.
Sending5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
.!!!!
Successrate is 80 percent (4/5), round-trip min/avg/max = 0/0/3 ms
2：备份交换机的IOS
SW1#showflash:
Directoryof flash:/
1 -rw- 4414921 <no date> c2960-lanbase-mz.122-25.FX.bin
64016384bytes total (59601463 bytes free)
SW1#copyflash: tftp:
Sourcefilename []? c2960-lanbase-mz.122-25.FX.bin
Addressor name of remote host []? 192.168.1.2
Destinationfilename [c2960-lanbase-mz.122-25.FX.bin]? c2960-text.bin
Writingc2960-lanbase-mz.122-25.FX.bin....!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OK- 4414921 bytes]
4414921bytes copied in 3.098 secs (1425000 bytes/sec)
3：还原交换机的IOS
SW1#copytftp: flash:
Addressor name of remote host []? 192.168.1.2
Sourcefilename []? c2960-text.bin
Destinationfilename [c2960-text.bin]?
Accessingtftp://192.168.1.2/c2960-text.bin...
Loadingc2960-text.bin from 192.168.1.2:!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OK- 4414921 bytes]
4414921bytes copied in 0.076 secs (1578338 bytes/sec)
SW1#showflash:
Directoryof flash:/
1 -rw- 4414921 <no date> c2960-lanbase-mz.122-25.FX.bin
2 -rw- 4414921 <no date> c2960-text.bin
64016384bytes total (55186542 bytes free)
SW1(config)#bootsystem flash:c2960-text.bin
SW1#reload
SW1#deleteflash:
Deletefilename []?c2960-text.bin
Deleteflash:/c2960-text.bin? [confirm]
SW1#showflash:
Directoryof flash:/
1 -rw- 4414921 <no date> c2960-lanbase-mz.122-25.FX.bin
64016384bytes total (59601463 bytes free)
实验配置二：备份和还原路由器IOS
1：建立路由器和TFTP服务器的通信
R1(config)#interfacefa0/0
R1(config-if)#ipaddress 192.168.1.1 255.255.255.0
R1(config-if)#noshutdown
TFTP服务器地址配置 (略)
测试路由器与TFTP服务器之间的通信：
R1(config-if)#doping 192.168.1.2
Typeescape sequence to abort.
Sending5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
.!!!!
Successrate is 80 percent (4/5), round-trip min/avg/max = 0/0/0 ms
2:备份路由器的IOS
R1#showflash:
Systemflash directory:
File Length Name/status
3 50938004 c2800nm-advipservicesk9-mz.124-15.T1.bin
2 28282 sigdef-category.xml
1 227537 sigdef-default.xml
[51193823bytes used, 12822561 available, 64016384 total]
63488Kbytes of processor board System flash (Read/Write)
R1#copyflash: tftp:
Sourcefilename []? c2800nm-advipservicesk9-mz.124-15.T1.bin
Addressor name of remote host []? 192.168.1.2
Destinationfilename [c2800nm-advipservicesk9-mz.124-15.T1.bin]? c2800-text.bin
Writingc2800nm-advipservicesk9-mz.124-15.T1.bin...!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!(略)
[OK- 50938004 bytes]
50938004bytes copied in 0.849 secs (59997000 bytes/sec)
3：还原路由器的IOS：
R1#copytftp: flash:
Addressor name of remote host []? 192.168.1.2
Sourcefilename []? c2800-text.bin
Destinationfilename [c2800-text.bin]?
Accessingtftp://192.168.1.2/c2800-text.bin...
Loadingc2800-text.bin from 192.168.1.2: !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!（略）
[OK- 50938004 bytes]
50938004bytes copied in 0.876 secs (4216168 bytes/sec)
%Error copyingtftp://192.168.1.2/c2800-text.bin (Not enough space on device)
R1#deleteflash:
Deletefilename []?c2800nm-advipservicesk9-mz.124-15.T1.bin
Deleteflash:/c2800nm-advipservicesk9-mz.124-15.T1.bin? [confirm]
R1#copytftp: flash:
Addressor name of remote host []? 192.168.1.2
Sourcefilename []? c2800-text.bin
Destinationfilename [c2800-text.bin]?
Accessingtftp://192.168.1.2/c2800-text.bin...
Loadingc2800-text.bin from 192.168.1.2: !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! （略）
[OK- 50938004 bytes]
50938004bytes copied in 0.865 secs (4269784 bytes/sec)
R1#showflash:
Systemflash directory:
File Length Name/status
4 50938004 c2800-text.bin
2 28282 sigdef-category.xml
1 227537 sigdef-default.xml
[51193823bytes used, 12822561 available, 64016384 total]
63488Kbytes of processor board System flash (Read/Write)
配套视频演示地址：
http://edu.51cto.com/course/course_id-1992.html