（1）给交换机配置管理地址，保证交换机与服务器相连通
SW1(config)#int vlan 1
SW1(config-if)#ip add 192.168.1.1 255.255.255.0
SW1(config-if)#no shut

SW1#write
（2）备份startup-config到服务器
SW1#copy startup-config tftp:
Address or name of remote host []? 192.168.1.2
Destination filename [SW1-confg]?
Writing startup-config…!!
[OK - 1090 bytes]
1090 bytes copied in 0 secs
（2）从服务器还原startup-config
SW1#conf t
SW1(config)#host sw123 //改名字，为了看清还原结果
sw123#copy tftp: running-config
Address or name of remote host []? 192.168.1.2
Source filename []? SW1-confg
Destination filename [running-config]?
Accessing tftp://192.168.1.2/SW1-confg…
Loading SW1-confg from 192.168.1.2: !
[OK - 1090 bytes]
1090 bytes copied in 0 secs
SW1#