Publication date: Sept, 2015
Revision A1
124
2-‐11.2 MLD Snooping
Curiously enough, a network node that acts as a source of IPv6 multicast traffic is only an indirect
participant in MLD snooping—it just provides multicast traffic, and MLD doesn’t interact with it.
(NOTE: In an application such as desktop conferencing, a network node may act as both a source and
an MLD host, but MLD interacts with that node only in its role as an MLD host.)
A source node creates multicast traffic by sending packets to a multicast address. In IPv6, addresses
with the first eight bits set (that is, “FF” as the first two characters of the address) are multicast
addresses, and any node that listens to such an address will receive the traffic sent to that address.
Application software running on the source and destination systems cooperates to determine what
multicast address to use. (NOTE: This is a function of the application software, not of MLD.)
When MLD snooping is enabled on a VLAN, the switch acts to minimize unnecessary multicast traffic.
If the switch receives multicast traffic destined for a given multicast address, it forwards that traffic
only to ports on the VLAN that have MLD hosts for that address. It drops that traffic for ports on the
VLAN that have no MLD hosts.
2-‐11.2.1 Basic Configuration
The section will explain how to configure the MLD Snooping basic configuration and the parameters.
Web Interface
To configure the MLD Snooping Configuration in the web interface:
1.
Click Configuration, MLD Snooping, Basic Configuration.
2.
Enable or disable the Global configuration parameters. Enable the port to join a Router port and
Fast Leave.
3.
Scroll to select the Throttling mode with unlimited or 1 to 10.
4.
Click Save to save the setting.
5.
To cancel the setting, click the Reset button. It will revert to previously saved values.
Summary of Contents for LPB2910A
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