Brocade TurboIron 24X Series Configuration Guide - Manual (Page 806)

772 Brocade TurboIron 24X Series Configuration Guide
53-1003053-01
PIM SM traffic snooping overview
The device stops forwarding IP multicast traffic on a port for a group if the port receives a prune
message for the group.
Notice that the ports connected to the source and the receivers are all in the same port-based
VLAN on the device. This is required for the PIM SM snooping feature. The devices on the edge of
the Global Ethernet cloud are configured for IGMP snooping and PIM SM traffic snooping. Although
this application uses multiple devices, the feature has the same requirements and works the same
way as it does on a single device.
The following figure shows another example application for PIM SM traffic snooping. This example
shows devices on the edge of a Global Ethernet cloud (a Layer 2 Packet over SONET cloud).
Assume that each device is attached to numerous other devices such as other Layer 2 Switches
and Layer 3 Switches (routers).
NOTE
This example assumes that the devices are actually devices running Layer 2 Switch software.
FIGURE 103 PIM SM traffic reduction in Global Ethernet environment
The devices on the edge of the Global Ethernet cloud are configured for IGMP snooping and PIM
SM traffic snooping. Although this application uses multiple devices, the feature has the same
requirements and works the same way as it does on a single device.