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1.  Configure the SFTP client: 
# Assign an IP address to VLAN-interface 2. 
<SwitchA> system-view 
[SwitchA] interface vlan-interface 2 
[SwitchA-Vlan-interface2] ip address 192.168.0.2 255.255.255.0 
[SwitchA-Vlan-interface2] quit 
# Generate RSA key pairs. 
[SwitchA] public-key local create rsa 
The range of public key size is (512 ~ 2048). 
If the key modulus is greater than 512, it will take a few minutes. 
Press CTRL+C to abort. 
Input the modulus length [default = 1024]: 
Generating Keys... 
........................++++++ 
...................++++++ 
..++++++++ 
............++++++++ 
Create the key pair successfully. 
# Export the host public key to the file pubkey. 
[SwitchA] public-key local export rsa ssh2 pubkey 
[SwitchA] quit 
# Transmit the public key file pubkey to the server through FTP or TFTP. (Details not shown.) 
2.  Configure the SFTP server: 
# Generate RSA key pairs. 
<SwitchB> system-view 
[SwitchB] public-key local create rsa 
The range of public key size is (512 ~ 2048). 
If the key modulus is greater than 512, it will take a few minutes. 
Press CTRL+C to abort. 
Input the modulus length [default = 1024]: 
Generating Keys... 
........................++++++ 
...................++++++ 
..++++++++ 
............++++++++ 
Create the key pair successfully. 
# Generate a DSA key pair. 
[SwitchB] public-key local create dsa 
The range of public key size is (512 ~ 2048). 
If the key modulus is greater than 512, it will take a few minutes. 
Press CTRL+C to abort. 
Input the modulus length [default = 1024]: 
Generating Keys... 
.++++++++++++++++++++++++++++++++++++++++++++++++++* 
........+......+.....+......................................+ 
...+.................+..........+...+ 
Create the key pair successfully.