Dell W-Series 304 Instant 6.4.3.1-4.2 User Guide - Page 361
Hotspot Profiles, Understanding Hotspot Profiles, Generic Advertisement Service (GAS),
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Chapter 29 Hotspot Profiles This chapter describes the following procedures: l Understanding Hotspot Profiles on page 361 l Configuring Hotspot Profiles on page 363 l Sample Configuration on page 374 In the current release, Instant supports the hotspot profile configuration only through the CLI. Understanding Hotspot Profiles Hotspot 2.0 is a Wi-Fi Alliance specification based on the 802.11u protocol, which allows wireless clients to discover hotspots using management frames (such as beacon, association request, and association response), connect to networks, and roam between networks without additional authentication. The Hotspot 2.0 provides the following services: l Network discovery and selection- Allows the clients to discover suitable and available networks by advertising the access network type, roaming consortium, and venue information through the management frames. For network discovery and selection, Generic Advertisement Service (GAS) and Access Network Query Protocol (ANQP) are used. l QOS Mapping- Provides a mapping between the network-layer QoS packet marking and over- the-air QoS frame marking based on user priority. When a hotspot is configured in a network: l The clients search for available hotspots using the beacon management frame. l When a hotspot is found, the client sends queries to obtain information about the type of network authentication and IP address, and IP address availability using the Generic Advertisement Service (GAS) action frames. l Based on the response of the advertisement Server (response to the GAS Action Frames), the relevant hotspot is selected and the client attempts to associate with it. l Based on the authentication mode used for mobility clients, the client authenticates to access the network. Generic Advertisement Service (GAS) GAS is a request-response protocol, which provides L2 transport mechanism between a wireless client and a server in the network prior to authentication. It helps in determining an 802.11 infrastructure before associating clients and allows clients to send queries to multiple 802.11 networks in parallel. Dell Networking W-Series Instant 6.4.3.1-4.2.0.0 | User Guide Hotspot Profiles | 361