After the NE40E is upgraded from V3R1 to V3R2, the device cannot be accessed through SSH with a trap record saying that the SSH server denies the access. 
Version before the upgrade: NE40E&80E V300R001C01B052. 
Version after the upgrade: NE40E&80E V300R002C06B323. 
 

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Do as follows to modify the related configuration of the SSH. 
The first configuration solution: two configurations are needed to realize SSH. 
stelnet server enable 
―A newly added command to V3R2. This command is needed for SSH to log in. 
ssh authentication-type default password 
― Enable this command and then SSH users employ automatically the users created in the aaa without the need to configure ssh user in the system view. 
The second configuration solution: Add each SSH user and specify the service type of the user to support stelnet. By doing so, SSH can be realized. For example: 
stelnet server enable 
ssh user username 
ssh user username authentication-type password 
ssh user username service-type stelnet 
― This command must be configured to select the service type. 
 

The realization of the original V3R1: 
There is only one solution: to specify the authentication type as password when adding each SSH user. The configuration of the current network: 
aaa 
local-user X.X.X.X.X password cipher .;\V:$N$01=B,.\#C3YB91!! 
local-user X.X.X.X.X service-type ssh 
local-user X.X.X.X.X level 3 
ssh user X.X.X.X.X authentication-type password 
user-interface vty 0 4 
authentication-mode aaa 
user privilege level 3 
protocol inbound all 
The realization of the current V3R2: 
The first configuration solution: two configurations are needed to realize SSH. 
stelnet server enable 
― A newly added command to V3R2. This command is needed for SSH to log in. 
ssh authentication-type default password 
― Enable this command and then SSH users employ automatically the users created in the aaa without the need to configure ssh user in the system view. 
The second configuration solution: Add each SSH user and specify the service type of the user to support stelnet. Thus, SSH can be realized. For example: 
stelnet server enable 
ssh user username 
ssh user username authentication-type password 
ssh user username service-type stelnet 
― This command must be configured to select the service type. 
Because the sftp and stelnet functions are added to the V3R2, the service-type command is added to the configuration for users to choose different service types and to ensure a better security. 
Users can choose a solution based on their needs. The application of the two solutions at the same time has the same effect.