SonicWALL TZ 190 Manuale Utente

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.

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. 

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.