If a remote authentication method does not return a local user attribute string after a remote user is authenticated, the remote user will be mapped to a default local user account.
Prerequisites
Admin access
To specify the default local user account:
Any non-mapped users will default to the specified local user account.
Go to CLI configuration mode:
hostname > enable
hostname # configure terminal
To specify the default local user account, use the following command:
Central Management System (CMS) > Central Management System System Administration Guide Release 10.x > Appendices > Configuring secure shell (SSH) authentication > User authentication