mDNS provides a general method for Apple devices to set up a network without any configuration. You should the limit use of mDNS to specific VLANs to prevent interference with the rest of the network. By default, a list of VLANs is determined by the cache entries returned by the controller and by the sessions on the network looking for a particular type of service. You can optionally specify a list of VLANs to limit access to certain resources. For example, by placing Apple TV (_airplay service) on a separate VLAN and Internet Printer (_ipp service) on another VLAN, you can limit those bandwidth-hungry services.
This topic describes:
From the Manage mDNS VLAN List page, you can:
Note: You cannot delete profiles that are in use—that is, assigned to objects or used by other profiles. To see the current assignments for an mDNS VLAN List, select the mDNS VLAN List and click Details.
Create an mDNS VLAN list to limit access to certain mDNS resources. A VLAN list works with an mDNS Profile, limiting mDNS applications to specified VLANs. Also see Creating and Managing mDNS Profiles.
To create an mDNS VLAN list:
Note: Do not select Dashboard View, Datacenter View, or Topology View.
The Manage mDNS Profile page appears, displaying a list of currently configured mDNS Profiles and their attributes.
The Create VLAN List page appears.
The system saves the Authorization profile and displays the Manage Authorization Profiles page. Your new or modified Authorization profile is listed in the table of Authorization profiles.
mDNS services such as Apple TV, Internet printer, or Digital Auto Access Protocol (iTunes) can consume extensive resources. To limit use of mDNS services to named VLANs:
Select existing VLANs to add to the list:
The Select VLAN window opens, displaying a list of configured VLANs and VLAN pools.
The selected VLAN pools are added to the list of VLANs and VLAN pools.
Select existing VLAN pools to add to the list:
The Select VLAN Pool window opens, displaying a list of configured VLAN Pools.
The selected VLAN pools are added to the list of VLANs and VLAN pools.
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