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authentication is enabled for the VTY and Web login method by default.
Command Mode: Global Mode.
Usage Guide: The authentication method for Console, VTY and Web login can be
configured respectively. And authentication method can be any one or combination of
Local, RADIUS. When login method is configuration in combination, the preference goes
from left to right. If the users have passed the authentication method, authentication
method of lower preferences will be ignored. To be mentioned, if the user receives
corresponding protocol‘s answer whether refuse or incept, it will not attempt the next
authentication method (Exception: if the local authentication method failed, it will attempt
the next authentication method); it will attempt the next authentication method if it receives
nothing. And AAA function RADIUS server should be configured before the RADIUS
configuration method can be used. And TACACS server should be configured before the
TACACS configuration method can be used.
The authentication line console login command is exclusive with the ―login‖
command. The authentication line console login command configures the switch to use
the Console login method. And the login command makes the Console login to use the
passwords configured by the password command for authentication.
If local authentication is configured while no local users are configured, users will be
able to login the switch via the Console method.
Example: Configure the remote login authentication mode to radius.
Switch(config)#authentication login radius
Relative Command: aaa enable, radius-server authentication host
1.2.4 authentication securityip
Command: authentication securityip <ip-addr>
no authentication securityip <ip-addr>
Function: To configure the trusted IP address for Telnet and HTTP login method. The no
form of this command will remove the trusted IP address configuration.
Parameters: <ip-addr> is the trusted IP address of the client in dotted decimal format
which can login the switch.
Default: No trusted IP address is configured by default.
Command Mode: Global Mode.
Usage Guide: IP address of the client which can login the switch is not restricted before
the trusted IP address is not configured. After the trusted IP address is configured, only
clients with trusted IP addresses are able to login the switch. Up to 32 trusted IP
addresses can be configured in the switch.
Example: To configure 192.168.1.21 as the trusted IP address.