Dell PowerConnect W-IAP92 Dell Instant 6.2.0.0-3.2.0.0 User Guide - Page 216

WLANs and Bonjour In large universities and enterprise networks, it is common for Bonjour-capable devices to connect to the network across VLANs. As a result, user devices such as an iPad on a specific VLAN cannot discover the Apple TV that resides on another VLAN. Broadcast and multicast traffic are usually filtered out from a wireless LAN network to preserve the airtime and battery life. This inhibits the performance of Bonjour services as they rely on multicast traffic. AirGroup Solution Dell addresses this multicast DNS (mDNS) challenge with the introduction of patent-pending AirGroup technology. AirGroup leverages key elements of Dell's solution portfolio including operating system software for Dell W-Instant and Dell PowerConnect W-ClearPass Policy Manager. AirGroup maintains seamless connectivity between clients and services across VLANs and SSIDs. The mDNS packet traffic is minimized thereby preserving valuable wired network bandwidth and WLAN airtime. AirGroup also enables context awareness for services across the network: l AirGroup is aware of personal devices. For example, an Apple TV in a dorm room can be associated with the student who owns it. l AirGroup is aware of shared resources. This might be an Apple TV in a meeting room or a printer in a supply room that is available to certain users, such as the marketing department. Or, in a classroom, teachers can use AirPlay to wirelessly project a laptop screen onto an HDTV monitor using an Apple TV. l AirGroup is aware of the location of services through Dell CPPM (Dell PowerConnect WClearPass Policy Manager) support. For example, depending on proximity, an iPad would be presented with the closest printer instead of all the printers in the building. Another example is a user in a conference room who wants to use AirPlay to project a MacBook screen on an HDTV monitor using an Apple TV receiver. When that users' device queries the network for a list of available Apple TVs, the location-aware W-IAP only shows the Apple TV closest to the user. All of these above filtering options require Dell PowerConnect W-ClearPass Policy Manager (CPPM). l In addition, the W-IAP supports Bonjour services' filtering options based on VLANs and roles for which Dell PowerConnect W-ClearPass Policy Manager is not required. The following table summarizes the filtering options which are described above. Table 37- AirGroup Features Features Allow mDNS to propagate across subnets/VLANs Dell W-Instant Deployment Models Integrated Integrated with CPPM Yes Yes 216 | AirGroup Dell PowerConnect W-Series Instant Access Point 6.2.0.0-3.2.0.0 | User Guide