Wireless Access Point
Configuring the Wireless AP 323
Advanced Traffic Optimization
Figure 169. Multicast Processing
20. Multicast Processing: This sets how multicast traffic is handled. 
Multicast traffic can be received by a number of subscribing stations at 
the same time, thus saving a great deal of bandwidth. In some of the 
options below, the AP uses IGMP snooping to determine the stations that 
are subscribed to the multicast traffic. IGMP (Internet Group 
Management Protocol) is used to establish and manage the membership 
of multicast groups. 
Multicast handling options are only applicable to traffic transmitted from 
the AP to wireless stations. Select one of the following options:
• Send multicasts unmodified. This is useful when multicast is not 
needed because no video or audio streaming is required or when it is 
used only for discovering services in the network. Some situations 
where you might use this option are: