Multicast
Unregistered Multicast
339 Cisco 500 Series Managed Switch Administration Guide
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Unregistered Multicast frames are usually forwarded to all ports on the VLAN. 
You can select a port to receive or reject (filter) unregistered Multicast streams. 
The configuration is valid for any VLAN of which the port is a member (or will be a 
member).
To define unregistered Multicast settings:
STEP 1 Click Multicast > Unregistered Multicast.
STEP  2 Select the Interface Type equals to— To view either ports or LAGs.
STEP  3 Click Go.
STEP  4 Define the following:
• Port/LAG—Displays the port or LAG ID.
• 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  5 Click Apply. The settings are saved, and the Running Configuration file is updated.