Cisco 200 Series Administration Manual page 136
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Configuring Multicast Forwarding
Defining Multicast Properties
STEP 1
STEP 2
Cisco Small Business 200 Series Smart Switch Administration Guide
A common way of representing Multicast membership is the (S,G) notation where
"S" is the (single) source sending a Multicast stream of data, and "G" is the IPv4 or
IPv6 group address. If a Multicast client can receive Multicast traffic from any
source of a specific Multicast group, this is written as (*,G).
The following are ways of forwarding Multicast frames:
•
MAC Group Address—Based on the destination MAC in the Ethernet frame.
As mentioned in the Multicast Address Properties section, one or
NOTE
more IP Multicast group addresses can be mapped into a MAC group
address. Forwarding based on MAC group address can result in an IP
Multicast stream being forwarded out to ports that have no receiver for
the stream.
•
IP Group Address—Based on the destination IP address of the IP packet
(*,G).
•
Source Specific IP Group Address—Based on both the destination IP
address and the source IP address of the IP packet (S,G).
By selecting the forwarding mode, you can define the method 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.
(S,G) is supported by IGMPv3 and MLDv2, while IGMPv1/2 and MLDv1 support
only (*.G) which is just the group ID.
The switch supports a maximum of 256 static and dynamic Multicast group
addresses.
To enable Multicast filtering, and select the forwarding method:
Click Multicast> Properties. The Properties Page opens.
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.
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