User guide

Brocade 6910 Ethernet Access Switch Configuration Guide 1057
53-1002581-01
Chapter
46Multicast Filtering
In this chapter
This chapter describes how to configure the following multicast services:
• IGMP – Configures snooping and query parameters.
• Filtering and Throttling – Filters specified multicast service, or throttling the maximum of
multicast groups allowed on an interface.
• Multicast VLAN Registration for IPv4 – Configures a single network-wide multicast VLAN shared
by hosts residing in other standard or private VLAN groups, preserving security and data
isolation.
• Multicast VLAN Registration for IPv6 – 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 352 Multicast Filtering Concept
Unicast
Flow
Multicast
Flow