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Figure 99 AirGroup Enables Personal Device Sharing
AirGroup Solution
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 an Apple TV that
resides on another VLAN. As the addresses used by the protocol are link-scope multicast addresses, each query or
advertisement can only be forwarded on its respective VLAN, but not across different VLANs.
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. Alcatel-Lucent
addresses this multicast DNS (mDNS) challenge with AirGroup technology.
AirGroup leverages key elements of Alcatel-Lucent’s solution portfolio including operating system software for AOS-
W Instant, CPPM , and the VLAN-based or role-based filtering options offered by Bonjour services. 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.
The following table summarizes the filtering options:
Features AOS-W Instant Deployment Models
Integrated Integrated with CPPM
Allow mDNS to propagate across subnets/VLANs Yes Yes
Limit multicast mDNS traffic on the network Yes Yes
VLAN based mDNS service policy enforcement Yes Yes
User-role based mDNS service policy
enforcement
Yes Yes
Portal to self register personal leaves No Yes
Table 53:
AirGroup Filtering Options
AOS-W Instant 6.3.1.1-4.0 | User Guide AirGroup Configuration | 270
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