n iPad users in L2, M, and L4 can discover any Apple TV or AirPrint Printer in L2, M, and L4.
n iPad users in M can discover any Apple TV or AirPrint printer in L1, L2, L3, and L4 and vice-versa.
n iPad users in L1 and L3 cannot discover any Apple TV or AirPrint printer in L2 and L4 and vice-versa.
Scalability
In a multi-switch deployment, there is a scaling limit of 2,000 AirGroup servers and 16,000 AirGroup users for
all switches in a cluster. If you require more servers and users than the prescribed limit, configure multiple
clusters so that each cluster is within the prescribed limit. For detailed scalability information, see AirGroup
Scalability Limits on page 1008.
An AirGroup domain can include a list of switches, which may participate in the multi-switch AirGroup cluster.
Depending on the deployment setup, the IP address in the AirGroup domain could either be the switch IP or
VRRP IP address. The configuration elements are defined by the administrator on a master switch and its
associated local switches that share the same configuration. The actual AirGroup multi-switch cluster may
include one or several local switches, and this cluster is defined by including one or several relevant AirGroup
domains, on the respective local switch, in the active-domain list. As a result, a master or local switch may
participate in one or more AirGroup clusters based on its active-domain list.
Incorrect or incomplete configuration of the switches participating in an AirGroup cluster can lead to disjoint
clusters. In a disjoint cluster, an AirGroup user will not have a seamless view of the AirGroup servers spanning
multiple switches. Therefore ensure that the participating switches in an AirGroup cluster are configured
appropriately.
The AirGroup domain configurations are restricted to the master switch. This ensures all local switches in a
master-local setup have unique AirGroup domain names. If duplicate AirGroup domain names on multiple
master switches are encountered, ensure that the duplicate AirGroup domain names have the same values to
participate in a single AirGroup cluster.
Any switch that shares VLANs with another switch must be part of the same AirGroup multi-switch cluster.
When an AirGroup switch has the list of all the switches in the multi-switch table, it uses an Alcatel-Lucent
proprietary protocol called Process Application Programming Interface (PAPI) to communicate with other
switches in the table. The PAPI control channel carries AirGroup specific packets only. For configuration details,
see Configuring an AirGroup Domain on page 1016.
Master-Local Switch Synchronization
Administrators can configure AirGroup from the master switch to ease deployment. The master switch then
synchronizes the AirGroup configuration elements with all the local switches it manages. For more information,
see Master-Local Switch Synchronization on page 1010.
Pre-configured AirGroup Services
The following services are pre-configured and available as part of the factory default configuration:
n AirPlay
n AirPrint
n iTunes
n RemoteMgmt
n Sharing
n Chat
n GoogleCast
AOS-W 6.5.3.x | User Guide AirGroup | 1002
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