The following table lists the individual Brocade FastIron switches and the IPv4 multicast traffic reduction
features they support. These features are supported in the Layer 2 and Layer 3 software images,
except where explicitly noted.

Feature

ICX 6430

ICX 6450

FCX

ICX 6610

ICX 6650

FSX 800
FSX 1600

ICX 7750

IGMP v1/v2/v3 snooping (global and
local)

08.0.01

08.0.10

IGMP fast leave for v2

08.0.01

08.0.10

IGMP membership tracking and fast
leave for v3

08.0.01

08.0.10

PIM-SM v2 Snooping

08.0.01

08.0.10

Static IGMP groups with support for
proxy

08.0.01

08.0.10

IGMP static group traffic filtering

08.0.01

IGMP snooping overview

When a device processes a multicast packet, by default, it broadcasts the packets to all ports except
the incoming port of a VLAN. Packets are flooded by hardware without going to the CPU. This behavior
causes some clients to receive unwanted traffic.

IGMP snooping provides multicast containment by forwarding traffic to only the ports that have IGMP
receivers for a specific multicast group (destination address). A device maintains the IGMP group

FastIron Ethernet Switch IP Multicast Configuration Guide

53-1003085-02