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IPv4 Multicast Traffic Reduction
● Supported IPv4 Multicast Traffic Reduction....................................................................13
● IGMP snooping overview................................................................................................ 13
● IGMP snooping configuration..........................................................................................17
● IGMP snooping show commands................................................................................... 26
● Clear commands for IGMP snooping..............................................................................34
● Disabling the flooding of unregistered IPv4 multicast frames in an IGMP-snooping-
enabled VLAN...............................................................................................................35
● PIM SM traffic snooping overview...................................................................................35
● PIM SM snooping configuration...................................................................................... 38
● PIM SM snooping show commands................................................................................39
Supported IPv4 Multicast Traffic Reduction
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 08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 08.0.10
IGMP fast leave for v2 08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 08.0.10
IGMP membership tracking and fast
leave for v3
08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 08.0.10
PIM-SM v2 Snooping 08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 08.0.10
Static IGMP groups with support for
proxy
08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 08.0.10
IGMP static group traffic filtering 08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 No No
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
13
53-1003085-02