3com 2928 User Guide

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configure an authentication server. If network usage information is expected to be recorded, you also 
need to configure an accounting server.  
As described above, AAA provides a uniform framework to implement network security management. It 
is a security mechanism that enables authenticated and authorized entities to access specific resources 
and records operations of the entities. As the AAA framework allows for excellent scalability and 
centralized user information management, it has gained wide application.  
AAA can be implemented through multiple protocols. Currently, the device supports using RADIUS, 
which is often used in practice. For details about RADIUS, refer to RADIUS Configuration
Introduction to ISP Domain 
An Internet service provider (ISP) domain represents a group of users. For a username in the 
userid
@isp-name format, the access device considers the userid part the username for authentication 
and the isp-name part the ISP domain name.  
In a networking scenario with multiple ISPs, an access device may connect users of different ISPs. As 
users of different ISPs may have different user attributes (such as username and password structure, 
service type, and rights), you need to configure ISP domains to distinguish the users. In addition, you 
need to configure different attribute sets including AAA methods for the ISP domains. 
For the NAS, each user belongs to an ISP domain. If a user does not provide the ISP domain name, the 
system considers that the user belongs to the default ISP domain. 
Configuring AAA 
Configuration Prerequisites 
1)  To deploy local authentication, you need to configure local users on the access device. Refer to 
User Configuration
 for details. 
2)  To deploy remote authentication, authorization, or accounting, you need to create the RADIUS 
schemes to be referenced. For details about RADIUS scheme configuration, refer to RADIUS 
Configuration
Configuration Task List 
Perform the tasks in 
 to configure AAA.