51# Create a RADIUS scheme.[Switch] radius scheme rad# Specify the primary authentication server.[Switch-radius-rad] primary authentication 10.1.1.1 1812# Set the shared key for secure communication with the server to expert in plain text.[Switch-radius-rad] key authentication simple expert# Include the domain names in usernames sent to the RADIUS server.[Switch-radius-rad] user-name-format with-domain[Switch-radius-rad] quit# Create ISP domain bbb and configure AAA methods for login users.[Switch] domain bbb[Switch-isp-bbb] authentication login radius-scheme rad[Switch-isp-bbb] authorization login radius-scheme rad[Switch-isp-bbb] accounting login none[Switch-isp-bbb] quitVerifying the configurationWhen the user initiates an SSH connection to the switch and enter the username hello@bbb and thecorrect password, the user successfully logs in and can use the commands for the network-operator userrole.Authentication for SSH users by an LDAP serverNetwork requirementsAs shown in Figure 16, an LDAP server is at the IP address 10.1.1.1/24 and uses the domain nameldap.com.Configure the switch to authenticate SSH users by using the LDAP server, and to assign the default userrole network-operator to SSH users who pass authentication.On the LDAP server, set the administrator password to admin!123456, add user aaa, and set the user'spassword to ldap!123456.Figure 16 Network diagramConfiguration procedure1. Configure the LDAP server: