Configuring Multicast Forwarding
Defining Unregistered Multicast Settings
Cisco Small Business 300 Series Managed Switch Administration Guide  164
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switch to forward the Multicast frames (from a registered Multicast group) only to 
ports that are joined to that Multicast group. The switch 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 switch (unregistered Multicast groups). 
Unregistered Multicast frames are usually forwarded to all ports on the VLAN. 
You can select a port to receive or filter unregistered multicast streams. The 
configuration is valid for any VLAN of which it is a member (or will be a member).
This feature ensures that the customer receives only the Multicast groups 
requested and not others that may be transmitted in the network. 
To define unregistered Multicast settings:
STEP 1 Click Multicast > Unregistered Multicast. The 
Unregistered Multicast Page
 
opens.
STEP  2 Define the following:
• Interface Type equals to—The view as all ports or all LAGs. 
• Entry No.—The entry number in the Unregistered Multicast Table.
• Interface—Displays the interface ID.
• Unregistered Multicast—Displays the forwarding status of the selected 
interface. The possible values are:
- Forwarding—Enables forwarding of unregistered Multicast frames to the 
selected interface. 
- Filtering—Enables filtering (rejecting) of unregistered Multicast frames to 
the selected interface.
STEP  3 Click Edit. The Edit Unregistered Multicast Page opens.
STEP  4 Define the Unregistered Multicast field. 
• Interface—Select the interface to be modified. 
• Unregistered Multicast—Define the forwarding status of the interface. The 
options are as follows:
- Forwarding—Enables forwarding of unregistered Multicast frames to the 
selected interface.