Multicast
Defining Unregistered Multicast Settings
266 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version)
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IGMP or MLD messages are not forwarded to ports defined as Forward All.
NOTE The configuration affects only the ports that are members of the selected VLAN.
To define Forward All Multicast:
STEP 1 Click Multicast > Forward All.
STEP 2 Define the following:
• VLAN ID equals to—The VLAN ID the ports/LAGs are to be displayed.
• Interface Type equals to—Define whether to display ports or LAGs.
STEP 3 Click Go. The status of all ports/LAGs are displayed.
STEP 4 Select the port/LAG that is to be defined as Forward All by using the following
methods:
• Static—The port receives all Multicast streams.
• Forbidden—Ports cannot receive any Multicast streams, even if IGMP/MLD
snooping designated the port to join a Multicast group.
• None—The port is not currently a Forward All port.
STEP 5 Click Apply. The Running Configuration file is updated.
Defining Unregistered Multicast Settings
Multicast frames are generally forwarded to all ports in the VLAN. If IGMP/MLD
Snooping is enabled, the device learns about the existence of Multicast groups,
and monitors which ports have joined which Multicast group. Multicast groups can
also be statically configured. Multicast groups that were either dynamically
learned or statically configured, are considered registered.
The device forwards Multicast frames (from a registered Multicast group) only to
ports that are registered to that Multicast group.
The Unregistered Multicast page enables handling Multicast frames that belong to
groups that are not known to the device (unregistered Multicast groups).
Unregistered Multicast frames are usually forwarded to all ports on the VLAN.
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