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Installing and Configuring Cisco Access Registrar, 4.2
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Chapter 5 Customizing Your Configuration
Configuring Session Management
Configuring Session Management
You can use session management to track user sessions, and/or allocate dynamic resources to users for
the lifetime of their sessions. You can define one or more Session Managers, and have each one manage
the sessions for a particular group or company.
Configuring a Resource Manager
Session Managers use Resource Managers, which in turn manage a pool of resources of a particular type.
The Resource Managers have the following types:
• IP-Dynamic—manages a pool of IP address and allows you to dynamically allocate IP addresses
from that pool of addresses
• IP-Per-NAS-Port—allows you to associate NAS ports to specific IP addresses, and thus ensure
specific NAS ports always get the same IP address
• IPX-Dynamic—manages a pool of IPX network addresses
• Group-Session-Limit—manages concurrent sessions for a group of users; that is, it keeps track of
how many sessions are active and denies new sessions after the configured limit has been reached
• User-Session-Limit—manages per-user concurrent sessions; that is, it keeps track of how many
sessions each user has, and denies the user a new session after the configured limit has been reached
• USR-VPN—allows you to set up a Virtual Private Network (VPN) using a US Robotics NAS. (A
Virtual Private Network is a way for companies to use the Internet to securely transport private data.)
• IP address pool—allows you to manage pool of dynamic IP addresses
• On-Demand Address Pool—allows you to manage pool of IP dynamic subnet address
• Session Cache—allows you to cache additional attributes to existing session
Each Resource Manager is responsible for examining the request and deciding whether to allocate a
resource for the user, pass the request through, or cause Cisco AR to reject the request.
Table 5-6 provides an overview of the process. The following sections describe the process in more
detail.
Creating a Resource Manager
You can use the default Resource Managers as models for any new Resource Managers you want to
create. The following describes how to create a Resource Manager that limits the number of users to 100
or less at any one time.
Ta b l e 5-6 Configuring ResourceManagers
Object Action
ResourceManagers Add new ResourceManager
Set type (Group-Session-Limit)
Set value (100)
SessionManagers Add new SessionManager
Set ResourceManager
Radius Set DefaultSessionManager