Cisco Systems SRW248G4PK9NA User Manual

Configuring IGMP Snooping

Cisco Small Business 300 Series Managed Switch Administration Guide 

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IP Source Address—Defines the source address to be included.

Click Apply. The IP Multicast group is added, and the device is updated.

To configure and display the registration of an IP group address, select an address 
and click Details.

The VLAN ID, IP Version, IP Multicast Group Address, and Source IP Address 
selected are displayed as read-only in the top of the window. You can select the 
filter type:

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Interface Type equals to—Select whether to display ports or LAGs.

For each interface, select its association type. The options are as follows:

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Static—Attaches the interface to the Multicast group as a static member.

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Forbidden—Specifies that this port is forbidden from joining this group on 
this VLAN.

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None—Indicates that the port is not currently a member of this Multicast 
group on this VLAN. This is selected by default until Static or Forbidden is 
selected.

Click Apply. The Running Configuration file is updated.

To support selective Multicast forwarding (IPv4), Bridge Multicast filtering must be 
enabled (in the Properties page), and IGMP Snooping must be enabled globally 
and for each relevant VLAN (in the IGMP Snooping page).

By default, a Layer 2 device forwards Multicast frames to all ports of the relevant 
VLAN, essentially treating the frame as if it were a Broadcast. With IGMP Snooping 
the device forwards Multicast frames to ports that have registered Multicast 
clients.

The device supports IGMP Snooping only on static VLANs. It does not support 
IGMP Snooping on dynamic VLANs.