Users Guide
This section contains the following AAA Authentication and Authorization for Roles conguration tasks:
• Conguring AAA Authentication for Roles
• Conguring AAA Authorization for Roles
• Conguring TACACS+ and RADIUS VSA Attributes for RBAC
Congure AAA Authentication for Roles
Authentication services verify the user ID and password combination. Users with dened roles and users with privileges are authenticated
with the same mechanism. There are six methods available for authentication: radius, tacacs+, local, enable, line, and none.
When role-based only AAA authorization is enabled, the enable, line, and none methods are not available. Each of these three methods
allows users to be veried with either a password that is not specic to their user ID or with no password at all. Because of the lack of
security these methods are not available for role only mode. When the system is in role-only mode, users that have only privilege levels are
denied access to the system because they do not have a role. For information about role only mode, see Conguring Role-based Only AAA
Authorization.
NOTE: Authentication services only validate the user ID and password combination. To determine which commands are permitted
for users, congure authorization. For information about how to congure authorization for roles, see Congure AAA
Authorization for Roles.
To congure AAA authentication, use the aaa authentication command in CONFIGURATION mode.
aaa authentication login {method-list-name | default} method [… method4]
Congure AAA Authorization for Roles
Authorization services determine if the user has permission to use a command in the CLI. Users with only privilege levels can use
commands in privilege-or-role mode (the default) provided their privilege level is the same or greater than the privilege level of those
commands. Users with dened roles can use commands provided their role is permitted to use those commands. Role inheritance is also
used to determine authorization.
Users with roles and privileges are authorized with the same mechanism. There are six methods available for authorization: radius,
tacacs+, local, enable, line, and none.
When role-based only AAA authorization is enabled, the enable, line, and none methods are not available. Each of these three
methods allows users to be authorized with either a password that is not specic to their userid or with no password at all. Because of the
lack of security, these methods are not available for role-based only mode.
To congure AAA authorization, use the aaa authorization exec command in CONFIGURATION mode. The aaa
authorization exec command determines which CLI mode the user will start in for their session; for example, Exec mode or Exec
Privilege mode. For information about how to congure authentication for roles, see
Congure AAA Authentication for Roles.
aaa authorization exec {method-list-name | default} method [… method4]
You can further restrict users’ permissions, using the aaa authorization command command in CONFIGURATION mode.
aaa authorization command {method-list-name | default} method [… method4]
Examples of Applying a Method List
The following conguration example applies a method list: TACACS+, RADIUS and local:
!
radius-server host 10.16.150.203 key <clear-text>
!
tacacs-server host 10.16.150.203 key <clear-text>
!
aaa authentication login ucraaa tacacs+ radius local
Security
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