Software Guide

Advanced Configuration
Tsunami
®
800 & 8000 Series - Software Management Guide 190
5.12 IGMP Snooping
Proxim’s Tsunami
®
devices support Internet Group Management Protocol (IGMP) Snooping feature. With IGMP Snooping
enabled on the device, multicast traffic is only forwarded to ports that are members of the specific multicast group. By
forwarding the traffic only to the destined ports, reduces unnecessary load on devices to process packets.
Explained below is the IGMP Snooping process with the help of a diagram:
Figure 5-113 IGMP Snooping Process
The router forwards the IP multicast data to the BSU/End Point A.
Lets say, with IGMP Snooping not enabled on the BSU/End Point A, the multicast data is transmitted over the wireless medium
irrespective of whether the multicast group address is a member of the multicast group table maintained in each BSU/End
Point A. With IGMP Snooping enabled, the BSU/End Point A transmits the data only when the multicast group address is a
member of the multicast group table, else drops the packet. The SU/End Point B will receive the multicast data.
: IGMP Snooping is applicable only in Bridge Mode.