Netgear XCM8806 - 8800 SERIES 6-SLOT CHASSIS SWITCH ユーザーズマニュアル

    } then {

          permit;

    }

}

After you create a policy file, use the following command to associate the policy file and filter 
to a set of ports:

configure igmp snooping vlan <vlanname> ports <portlist> filter [<policy> | 

none]

 

To remove the filter, use the 

none

 option.

To display the IGMP snooping filters, use the following command:

show igmp snooping {vlan} <name> filter

 

Limiting the Number of Multicast Sessions on a Port

The default configuration places no limit on the number of multicast sessions on each VLAN 
port. To place a limit on the number of sessions, use the following command:

configure igmp snooping {vlan} <vlanname> ports <portlist> set join-limit 

{<num>}

To remove a session limit, use the following command:

unconfigure igmp snooping {vlan} <vlanname> ports <portlist> set join-limit

Enabling and Disabling IGMP Snooping Fast Leave

When the fast leave feature is enabled and the last VLAN host leaves a multicast group, the 
router immediately removes the VLAN interface from the multicast group. The router does not 
query the VLAN for other members of the multicast group before removing group 
membership and the multicast interface.

The default setting for IGMP snooping fast leave is disabled. To enable the fast leave feature, 
use the following command:

enable igmp snooping {vlan} <name> fast-leave

To disable the fast leave feature, use the following command:

disable igmp snooping {vlan} <name> fast-leave

Using IGMP-SSM Mapping

IGMPv1 and IGMPv2 hosts can use PIM SSM if IGMP-SSM mapping is enabled and 
configured on the XCM8800 switch. When the router receives an IGMPv1 or IGMPv2 
membership report for a group G, the router uses SSM mapping to determine one or more 
source IP addresses for group G. SSM mapping then interprets (not translates) the 
membership report as an IGMPv3 report and sends out PIM-SSM joins toward (S1, G) to (Sn, 
G).