Chapter 6 Using Multicast Manager 139Using Optivity Switch Manager, Release 1.1.0.0Viewing L3-IGMP informationLayer 3 IGMP allows an IP Multicast router to learn the existence of host groupmembers on their directly connected subnets.Passport 1000 Series switches and Passport 8600 switches support layer 3 IGMP.To view L3-IGMP information:The L3 IGMP table opens in the contents pane with the Cache tab displayed(Figure 64).Table 43 Access tab fieldsField DescriptionVlanId VLAN ID for the VLAN.GrpAddress Multicast group address of the multicast stream.HostAddress IP address of the host whose membership is to becontrolled.HostMask Subnet mask of the host whose membership is to becontrolled.Mode The host address mode, which can be one of thefollowing:• denyTx—deny transmit mode• denyRx—deny receive mode• denyBoth—deny transmit and receive modeSelect a device listed under the L3 IGMP icon.
