Brocade FastIron Ethernet Switch IP Multicast Configuration Guide - Manual (Page 45)

IPv6 Multicast Traffic Reduction
● IPv6 Multicast Traffic Reduction......................................................................................43
● MLD snooping overview..................................................................................................43
● MLD snooping configuration........................................................................................... 48
● Displaying MLD snooping information.............................................................................55
● Clearing MLD snooping counters and mcache............................................................... 61
● Disabling the flooding of unregistered IPv6 multicast frames in an MLD-snooping-
enabled VLAN...............................................................................................................62
● PIM6 SM traffic snooping overview.................................................................................62
● PIM6 SM snooping configuration.................................................................................... 65
● PIM6 SM snooping show commands..............................................................................66
IPv6 Multicast Traffic Reduction
Lists IPv6 Multicast Traffic Reduction features supported on FastIron devices.
The following table lists the individual Brocade FastIron switches and the IPv6 Multicast Traffic
Reduction features they support. These features are supported in the Layer 2 and Layer 3 software
images.
Feature ICX 6430 ICX 6450 FCX ICX 6610 ICX 6650 FSX 800
FSX 1600 ICX 7750
MLD v1/v2 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
MLD fast leave for v1 08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 08.0.10
MLD tracking and 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
Static MLD 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
MLD v1/v2 snooping per VLAN 08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 08.0.10
PIM6-SM snooping 08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 08.0.01 08.0.10
MLD snooping overview
The default method a device uses to process an IPv6 multicast packet is to broadcast it to all ports
except the incoming port of a VLAN. Packets are flooded by hardware without going to the CPU, which
may result in some clients receiving unwanted traffic.
If a VLAN is not Multicast Listening Discovery (MLD) snooping-enabled, it floods IPv6 multicast data
and control packets to the entire VLAN in hardware. When snooping is enabled, MLD packets are
trapped to the CPU. Data packets are mirrored to the CPU and flooded to the entire VLAN. The CPU
then installs hardware resources so subsequent data packets can be hardware-switched to desired
FastIron Ethernet Switch IP Multicast Configuration Guide 43
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