Dell W-Series 207 Instant 6.5.1.0-4.3.1.0 User Guide - Page 281

Figure 73 Bonjour Services and AirGroup Architecture For a list of supported Bonjour services, see AirGroup Services on page 283. DLNA UPnP Support In addition to the mDNS protocol, W-IAPs now support Universal Plug and Play (UPnP), and DLNA-enabled devices. DLNA is a network standard derived from UPnP, which enables devices to discover the services available in a network. DLNA also provides the ability to share data between the Windows or Android-based multimedia devices. All the features and policies applicable to mDNS are extended to DLNA to ensure full interoperability between compliant devices. In a UPnP-based scenario, the following types of devices are available in a network: l Controlled devices (servers) l Control points (clients) When a controlled device joins a network and acquires IP address, it multicasts a number of discovery messages for advertising itself, its embedded devices, and services. On the other hand, when a control point joins a network, it may multicast a search discovery message for finding interesting devices and services. The devices listening on the multicast address respond if they match the search criteria in the search message. In a single W-IAP network, the W-IAP maintains a cache table containing the list of discovered services in the network. The W-IAP also enforces native policies such as disallowing roles and VLANs and the policies defined on ClearPass Policy Manager to determine the devices or services that are allowed and can be discovered in the network. Whenever a search request comes, the W-IAP looks up its cache table and filters the cached data, based on configured policies, then builds a search response, and unicasts it to the requesting device. In a W-IAP cluster, the W-IAPs maintain a list of associated UPnP devices and allow the discovery of the associated devices. Dell Networking W-Series Instant 6.5.1.0-4.3.1.0 | User Guide Services | 281