Reference Guide

118 | hotspot hs-profile Dell Networking W-Series Instant 6.4.0.2-4.1 | CLI Reference Guide
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) Queries
An Organization Identifier (OI) is a unique identifier assigned to a service provider when it registers with the IEEE
registration authority. A W-IAP can include its service provider OI in beacons and probe responses to clients. If a
client recognizes the OI, it will attempt to associate to the W-IAP using the security credentials corresponding to that
service provider.
If the client does not recognize the OI, that client can send a Generic Advertisement Service (GAS) query to the AP
to request more information more about the network before associating.
ANQP Information Elements
ANQP Information Elements (IEs) are additional data that can be sent from the AP to the client to identify the AP’s
network and service provider. If a client requests this information via a GAS query, the hotspot AP then sends the
ANQP Capability list in the GAS Initial Response frame indicating support for the following IEs:
l Venue Name - Defined using the hotspot anqp-venue-name-profile command.
l Domain Name: Defined using the hotspot anqp-domain-name-profile command.
l Network Authentication Type: Define using the hotspot anqp-nwk-auth-profile command.
l Roaming Consortium List: Defined using the hotspot anqp-roam-cons-profile command.
l NAI Realm: Defined using the hotspot anqp-nai-realm-profile command.
l Cellular Network Data: Defined using the hotspot anqp-3gpp-nwk-profile command.
l Connection Capability: Defined using the hotspot h2qp-conn-capability-profile command.
l Operator Class: Defined using the hotspot h2qp-op-cl-profile command.
l Operator Friendly Name: Defined using the hotspot h2qp-operator-friendly-name-profile command.
l WAN Metrics: Defined using the hotspot h2qp-wan-metrics-profile command.
Roaming Consortium OIs
Organization Identifiers (OIs) are assigned to service providers when they register with the IEEE registration
authority. You can specify the OI for the hotspot’s service provider in the ANQP Roaming Consortium profile using
the hotspot anqp-roam-cons-profile command. This Hotspot profile also allows you to define and send up to three
additional roaming consortium OIs for the service provider’s top three roaming partners. To send this additional data
to clients, you must specify the number of roaming consortium elements a client can query using the addtl-roam-
cons-ois <1-3> parameter, then define those elements using the following parameters:
l roam-cons-oi-1 and roam-cons-len 1
l roam-cons-oi-2 and roam-cons-len 2