Use the following guidelines when you configure multicast access policies:
Use masks to specify a range of hosts. For example, 10.177.10.8 with a mask of 255.255.255.248 matches hosts addresses 10.177.10.8 through 10.177.10.15. The host subnet address and the host mask must be equal to the host subnet address. An easy way to determine this is to ensure that the mask has an equal or fewer number of trailing zeros than the host subnet address. For example, 3.3.0.0/255.255.0.0 and 3.3.0.0/255.255.255.0 are valid. However, 3.3.0.0/255.0.0.0 is not.
Apply receive-access policies to all eligible receivers on a segment. Otherwise, one host joining a group makes that multicast stream available to all.
Receive access policies are initiated after the switch receives reports with addresses that match the filter criteria.
Transmit access policies apply after the switch receives the first packet of a multicast stream.
Multicast access policies can apply to a routed PIM interface if Internet Group Management Protocol (IGMP) reports the reception of multicast traffic.
The following rules and limitations apply to IGMP access policy parameters when you use them with IGMP instead of PIM:
The static member parameter applies to IGMP snooping and PIM on both interconnected links and edge ports.
The Static Not Allowed to Join parameter applies to IGMP snooping and PIM on both interconnected links and edge ports.
For multicast access control, the denyRx parameter applies to IGMP snooping and PIM. The DenyTx and DenyBoth parameters apply only to IGMP snooping.