Cisco 300 Series Administration Manual page 279
Managed switch
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- Cli manual (1117 pages) ,
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STEP 1
STEP 2
254
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 saved as (*,G).
The following are ways of forwarding Multicast frames:
•
MAC Group Address—Based on the destination MAC address in the
Ethernet frame.
As mentioned before, one or more IP Multicast group addresses
NOTE
can be mapped to a MAC group address. Forwarding, based on the MAC
group address, can result in an IP Multicast stream being forwarded 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 device supports a maximum of 256 static and dynamic Multicast group
addresses.
To enable Multicast filtering, and select the forwarding method:
Click Multicast > Properties.
Enter the parameters.
•
Bridge Multicast Filtering Status—Select to enable filtering.
•
VLAN ID—Select the VLAN ID to set its forwarding method.
•
Forwarding Method for IPv6—Set one of the following forwarding
methods for IPv6 addresses: MAC Group Address, IP Group Address, or
Source Specific IP Group Address.
•
Forwarding Method for IPv4—Set one of the following forwarding
methods for IPv4 addresses: MAC Group Address, IP Group Address, or
Source Specific IP Group Address.
Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version)
Multicast
Defining Multicast Properties
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