3Com S7906E - Switch, Configuration Manual

Page: 1350 / 2621

1-1
1
MLD Snooping Configuration
When configuring MLD snooping, go to these sections for information you are interested in:
z
MLD Snooping Overview
z
MLD Snooping Configuration Task List
z
Displaying and Maintaining MLD Snooping
z
MLD Snooping Configuration Examples
z
Troubleshooting MLD Snooping
z
The S7900E Series Ethernet Switches are distributed devices that support Intelligent Resilient
Framework (IRF). Two S7900E series can be connected together to form a distributed IRF device.
If an S7900E series is not in any IRF, it operates as a distributed device; if the S7900E series is in
an IRF, it operates as a distributed IRF device. For introduction of IRF, refer to IRF Configuration in
the System Volume.
z
EA boards (such as LSQ1GP12EA and LSQ1TGX1EA) do not support IPv6 features.
MLD Snooping Overview
Multicast Listener Discovery Snooping (MLD snooping) is an IPv6 multicast constraining mechanism
that runs on Layer 2 devices to manage and control IPv6 multicast groups.
Introduction to MLD Snooping
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.
As shown in Figure 1-1 , when MLD snooping is not running, IPv6 multicast packets are broadcast to all
devices at Layer 2. When MLD snooping runs, multicast packets for known IPv6 multicast groups are
multicast to the receivers at Layer 2.