Introducing Aruba’s User-Centric Network
In recent years, controller-based wireless switch architectures have been widely adopted to overcome the limitations of the autonomous AP. The Aruba centralized WLAN model shown below represents a structured model for WLAN deployment and ongoing management using a holistic approach to build enterprise WLANs that support user mobility without sacrificing security, manageability and scalability.
The Aruba User-Centric Network is an “overlay” network consisting of a centralized Mobility Controller and thin APs that work together over an existing high-speed network. Most enterprise networks have been engineered for high performance and high reliability, therefore, deploying the Aruba User-Centric Network as an overlay will not adversely affect the investment and reliability of the existing network.
With this approach, a centralized appliance controls hundreds or thousands of network-attached radios in a secure, reliable manner. This model represents a unified mobility solution integrating user mobility, identity based security, remote access, and enterprise fixed mobile convergence (eFMC) solutions.
Centralized WLAN Model
| Client | | |
| termination | | Mobility |
| point | Thin AP |
| controller |
Tunnel
In this system, the intelligence that once resided in autonomous APs is now integrated into a centralized WLAN Mobility Controller designed for high-performance 802.11 packet processing, mobility and security management. These controllers are typically deployed in secured data center environment or distribution closets with redundant power and connectivity. APs are simplified and become network- attached radios that perform only transceiver and air monitoring functions. These access points are commonly referred to as “thin” APs. Connected to the Mobility Controller directly or over a layer 2/3 network by encrypted tunnels, they become extended access ports on the Mobility Controller directing user traffic to the controller for processing; while providing visibility and control of the RF environment to protect against intrusions (such as unauthorized users or rogue APs).
8 Aruba’s User-Centric Network Architecture | Campus Wireless Networks Validated Reference Design Version 3.3 Design Guide |
