Internet Group Management Protocol (IGMP) Snooping

IGMP snooping is a method wherein Switches, AP, and Controllers can listen in on IGMP messages between hosts and routers.

The Network Switches will intelligently forward multicast traffic only to those ports that have joined the multicast group. IGMP snooping can be configured on network switches and access points.

To enable multicast features across subnet boundaries, perform the following steps:

Enable IGMP snooping for all Switches, AP, and Controllers . For example, switches and access points on each subnet used by the badge.
Enable IP multicast routing on all intermediate routers or other network devices on the Vocera subnets.
Enable PIM Sparse-Dense mode on all VLANs where the Voice traffic will traverse.