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This Solution Guide describes best practices for implementing an Aruba 802.11 wireless network that supports thousands of highly mobile devices (HMDs) such as Wi-Fi phones, handheld scanning terminals, voice badges, and computers mounted to vehicles. It describes the design principles particular to keeping devices that are in constant motion connected to the network as well as best practices for configuring Aruba Networks controllers and the mobile devices. The comprehensive guide addresses six areas of network planning to ensure a high quality of service for roaming data and voice sessions: device configuration, airtime optimization, roaming optimization, IP mobility configuration, IP multicast configuration, and interference resistance. A detailed troubleshooting section covers common issues that arise with these types of WLANs.
In the recent years, Wi-Fi has become a critical part of enterprise and campus networks. With the introduction of 802.11ac, which provides gigabit speed, many companies are moving towards all wireless offices. Moving to an all wireless office is cost-effective and provides a flexible work environment to employees, which enables them to work from anywhere. In an all wireless enterprise or campus network, where users are not restricted to working from their desks, roaming becomes an essential part of a wireless network design, people move to various parts of a building while on a Lync call using their smart phone and/or uploading/downloading files from the shared server.
To support this functionality, seamless roaming between access points is provided to ensure best quality of service and user experience. This document provides best practices and guidelines to optimize RF and improve roaming in the Aruba WLAN architecture that supports thousands of mobile devices such as laptops, smart phone, tablets, hand-held scanning terminals, and voice badges. The following areas are significantly impacted when a wireless network supports many roaming devices:
- AP Selection and Placement Recommendation
- RF Consideration
- Roaming Optimization
- Device Configuration
This guide discusses the design principles and configuration guidelines in each of the above areas.
This VRD covers the deployment of Aruba WLAN in a typical campus network, and it is considered part of the Base Designs within the VRD core technologies series. This guide covers the design recommendations for a campus deployment and it explains the various configurations needed to implement the Aruba secure, highperformance, multimedia grade WLAN solution in large campuses.
Aruba WLAN has a logical four-tier operating model that consists of these four layers:
Management - The management layer consists of AirWave®. AirWave provides a single point of management for the WLAN, including reporting, heat maps, centralized configuration, and troubleshooting.
Network services - The network services layer consists of master mobility controllers and Amigopod. Amigopod provides secure and flexible visitor management services. The master controllers provide a control plane for the Aruba WLAN that spans the physical geography of the wired network. The control plane does not directly deal with user traffic or access points (APs). Instead the control plane provides services such as whitelist coordination, valid AP lists, Control Plane Security (CPSec) certificates, Radio Frequency Protect (RFProtect™) coordination, and Remote Authentication Dial-In User Service (RADIUS) or authentication, authorization, and accounting (AAA) proxy.
Aggregation - The aggregation layer is the interconnect point where the AP, air monitor (AM), and spectrum monitor (SM) traffic aggregates. This layer provides a logical point for enforcement of roles and policies on centralized traffic that enters or exits the enterprise LAN.
Network access - The network access layer is comprised of APs, AMs, and SMs that work together with the aggregation layer controllers to overlay the Aruba WLAN.
Planning and Overview
Requirements and Planning
Centralized WLAN Basic Concepts
Policy Enforcement Firewall
VLAN Design and Mobility
Client Roaming and RF Optimization
Campus WLAN Deployment