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SonicOS Enhanced 4.0 Administrator Guide
Multicast Snooping
This section provides configuration tasks for Multicast Snooping.
• Enable Multicast - This checkbox is disabled by default. Select this checkbox to support
multicast traffic.
• Require IGMP Membership reports for multicast data forwarding - This checkbox is
enabled by default. Select this checkbox to improve performance by regulating multicast
data to be forwarded to only interfaces joined into a multicast group address using IGMP.
• Multicast state table entry timeout (minutes) - This field has a default of 5. The value
range for this field is 5 to 60 (minutes). Update the default timer value of 5 in the following
conditions:
–
You suspect membership queries or reports are being lost on the network.
–
You want to reduce the IGMP traffic on the network and currently have a large number
of multicast groups or clients. This is a condition where you do not have a router to route
traffic.
–
You want to synchronize the timing with an IGMP router.
Multicast Policies
This section provides configuration tasks for Multicast Policies.
• Enable reception of all multicast addresses - This radio button is not enabled by default.
Select this radio button to receive all (class D) multicast addresses. Receiving all multicast
addresses may cause your network to experience performance degradation.
• Enable reception for the following multicast addresses - This radio button is enabled
by default. In the pull-down menu, select Create a new multicast object or Create new
multicast group.
Note Only address objects and groups associated with the MULTICAST zone are available to
select. Only addresses from 224.0.0.1 to 239.255.255.255 can be bound to the MULTICAST
zone.