Configuring Multicast Forwarding
MAC Group Address
Cisco Small Business 300 Series Managed Switch Administration Guide  151
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To enable Multicast filtering, and select the forwarding method: 
STEP 1 Click Multicast> Properties. The Properties Page
 
opens.
STEP  2 Enter the parameters.
• Bridge Multicast Filtering Status—Enable or disable filtering. 
• VLAN ID—Select the VLAN ID to set its forwarding method.
• Forwarding Method for IPv6—Set the forwarding method for IPv6 
addresses. These are used by hardware to identify Multicast flow by one of 
the following options: MAC Group Address, IP Group Address, or Source 
Specific IP Group Address.
• Forwarding Method for IPv4—Set the forwarding method for IPv4 
addresses. These are used by hardware to identify Multicast flow by one of 
the following options: MAC Group Address, IP Group Address, or Source 
Specific IP Group Address.
STEP  3 Click Apply. The switch is updated.
MAC Group Address
The switch supports forwarding incoming Multicast traffic based on the Multicast 
group information. This information is derived from the IGMP/MLD packets 
received or as the result of manual configuration, and stored in the Multicast 
Forwarding Database (MFDB).
When a frame is received from a VLAN that is configured to forward multicast 
streams based on MAC group addresses, and its destination address is a Layer 2 
Multicast address, the frame is forwarded to all ports that are members of the 
MAC group address.
The 
MAC Group Address Page 
has the following functions:
• Query and view information from the Multicast Filtering Database relating to 
a specific VLAN ID or a specific MAC address group. This data is acquired 
either dynamically through IGMP/MLD snooping or statically by manual 
entry.
• Add or delete static entries to this database which provides static 
forwarding information based on MAC destination addresses.