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Transition Networks
S4224 Web User Guide
33558 Rev. C
Page 186 of 669
MLD
Snooping
The MLD Snooping menu provides for Basic Configuration, VLAN Configuration, and Port Group Filtering
configuration from the sub-menus from the Configuration > IPMC > MLD Snooping menu path..
Multicast Listener Discovery for IPv6 (MLD) is used by IPv6 routers to discover multicast listeners on a
directly attached link, much as IGMP is used in IPv4. The protocol is embedded in ICMPv6 instead of
using a separate protocol. MLD snooping is an IPv6 multicast constraining mechanism that runs on
Layer 2 devices to manage and control IPv6 multicast groups. By analyzing received MLD messages,
a Layer 2 device running MLD snooping establishes mappings between ports and multicast MAC
addresses and forwards IPv6 multicast data based on these mappings. When MLD snooping is not
running, IPv6 multicast packets are broadcast to all devices on Layer 2. With MLD snooping running,
multicast packets for known IPv6 multicast groups are multicast to the receivers at Layer 2. MLD
snooping forwards multicast data to only the receivers requiring it at Layer 2, providing advantages such
as reducing Layer 2 broadcast packets for network bandwidth savings, enhancing multicast traffic
security, and providing per-host accounting.
Basic Configuration
From the
Configuration
>
IPMC
>
MLD Snooping
>
Basic Configuration
menu path you can view and
edit the MLD Snooping global and port configurations.
This page provides MLD Snooping related configuration at the global and port level.
Snooping Enabled
Check to enable Global MLD Snooping. The default is unchecked (snooping disabled).
Unregistered IPMC Flooding Enabled
Enable unregistered IPMCv6 traffic flooding.
Note
: disabling unregistered IPMCv6 traffic flooding may
cause Neighbor Discovery failure. The default is checked (enabled).