Chapter 2 Understanding Cisco Access Registrar

Cross Server Session and Resource Management

When the front line Cisco AR server receives the access-request, it does the regular AA processing. If the packet is not rejected and a Central Resource Cisco AR server is also configured, the front line Cisco AR server will proxy the packet1 to the configured Central Resource Cisco AR. If the Central Resource Cisco AR server returns the requested resources, the process continues to the local session management (if local session manager is configured) for allocating any local resources. If the Central Resource Cisco AR server cannot allocate the requested resource, the packet is rejected.

When the Accounting-Stop packet arrives at the frontline Cisco AR, it does the regular accounting processing. Then, if the front line Cisco AR server is configured to use Central Resource Cisco AR, a proxy packet will be sent to Central Resource Cisco AR server for it to release all the allocated resources for this session. After that, any locally allocated resources are released by the local session manager.

Session-Service Service Step and Radius-Session Service

A new Service step has been added in the processing of Access-Request and Accounting packets. This is an additional step after the AA processing for Access packet or Accounting processing for Accounting packet, but before the local session management processing. The Session-Service should have a service type of Radius-Session.

An environment variable Session-Service is introduced to determine the Session-Service dynamically. You can use a script or the policy engine to set the Session-Service environment variable.

Configuring a Front Line Cisco Access Registrar

To use a Central Resource server, the DefaultSessionService property must be set or the Session-Service environment variable must be set through a script or the policy engine. The value in the Session-Service variable overrides the DefaultSessionService.

The configuration parameters for a Session-Service service type are the same as those for configuring a radius service type for proxy, except the service type is radius-session.

The configuration for a Session-Service Remote Server is the same as configuring a proxy server.

[ //localhost/Radius ] Name = Radius Description = Version = 1.7R0 IncomingScript = OutgoingScript = DefaultAuthenticationService = local-users DefaultAuthorizationService = local-users DefaultAccountingService = local-file DefaultSessionService = Remote-Session-Service DefaultSessionManager = session-mgr-1

[ //localhost/Radius/Services ] Remote-Session-Service/

Name = Remote-Session-Service

Description =

Type = radius-session

1. The proxy packet is actually a resource allocation request, not an Access Request.

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Cisco Systems 3.5 Session-Service Service Step and Radius-Session Service, Configuring a Front Line Cisco Access Registrar

3.5 specifications

Cisco Systems 3.5 is an advanced version of Cisco's renowned networking and security solutions. This iteration showcases significant enhancements in performance, scalability, and security, making it a preferred choice for enterprises aiming to optimize their network operations and bolster their cybersecurity posture.

One of the main features of Cisco Systems 3.5 is its enhanced network automation capabilities. Automation streamlines network management, allowing organizations to apply consistent policies across their infrastructure while minimizing human error. This version employs advanced algorithms and machine learning to predict and rectify network issues proactively. With automation tools, network administrators can configure, monitor, and troubleshoot their networks with unprecedented efficiency.

Another notable characteristic of Cisco Systems 3.5 is its integration of artificial intelligence and machine learning into networking processes. The incorporation of AI enhances decision-making by analyzing vast amounts of network data, identifying patterns, and offering insights that help ensure optimal performance. This predictive analytics capability allows organizations to predict potential disruptions before they impact operations.

Security is a major focus in Cisco Systems 3.5. The platform introduces advanced threat detection and response systems that utilize deep learning to identify and mitigate emerging threats in real-time. Enhanced encryption protocols ensure that data transmitted over the network remains secure, protecting sensitive information from cyber threats. The integrated security features ensure compliance with various regulatory standards, a crucial requirement for businesses across multiple sectors.

The platforms' support for Software-Defined Networking (SDN) allows for dynamic resource allocation and traffic management. This flexibility enables organizations to adjust their network resources quickly in response to changing demands, leading to improved efficiency and reduced operational costs. Cisco Systems 3.5 also supports multicloud environments, facilitating seamless integration with cloud services such as AWS, Google Cloud, and Microsoft Azure.

Moreover, Cisco Systems 3.5 offers robust telemetry features, providing detailed real-time insights into network performance and health. This data-driven approach allows organizations to make informed decisions regarding capacity planning and resource optimization.

In summary, Cisco Systems 3.5 combines cutting-edge technologies such as AI, machine learning, and SDN to deliver a comprehensive networking solution. With its focus on automation, enhanced security, and multicloud support, this version is well-suited for modern enterprises looking to enhance their network infrastructure and security measures. As organizations continue to evolve in a digital-centric world, Cisco Systems 3.5 stands out as a critical tool to achieve connectivity and security goals effectively.