On the S series switches of all versions:
When you log in a a switch through a console port, no default user name or password is provided. The system asks you to set the user name and password when you log in to the switch for the first time.
Before you log in to a switch through Telnet, create a Telnet account.
You can set the Telnet login authentication method in the VTY. If the password authentication mode is configured, set a password in the VTY. If the AAA local authentication mode is configured, set the user name and password in the AAA view. If the remote AAA authentication mode is configured, set the user name and password on the AAA server.
When you log in to a switch through web, your default user level is 0: visit level.
For other default passwords, see Table 1
By default, the console login password, BootROM password, and Telnet password are case-sensitive.
Table 1 Default passwords used by S series switches