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16 Multicast Filtering
This chapter describes how to configure the following multicast services:
◆ IGMP – Configuring snooping and query parameters.
◆ Filtering and Throttling – Filtering specified multicast service, or throttling the
maximum of multicast groups allowed on an interface.
◆ MLD Snooping – Configures snooping and query parameters for IPv6.
◆ Multicast VLAN Registration (MVR) – Configures a single network-wide
multicast VLAN shared by hosts residing in other standard or private VLAN
groups, preserving security and data isolation.
Overview
Multicasting is used to support real-time applications such as video conferencing
or streaming audio. A multicast server does not have to establish a separate
connection with each client. It merely broadcasts its service to the network, and
any hosts that want to receive the multicast register with their local multicast
switch/router. Although this approach reduces the network overhead required by a
multicast server, the broadcast traffic must be carefully pruned at every multicast
switch/router it passes through to ensure that traffic is only passed on to the hosts
which subscribed to this service.
Figure 309: Multicast Filtering Concept
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