Users Guide

In the following example, virtual local area network (VLAN) 400 is configured with an access list to permit only IGMP reports for group
239.0.0.1. Though Receiver 2 sends a membership report for groups 239.0.0.1 and 239.0.0.2, a multicast routing table entry is created only
for group 239.0.0.1. VLAN 300 has no access list limiting Receiver 1, so both IGMP reports are accepted and two corresponding entries
are created in the routing table.
Figure 48. Preventing a Host from Joining a Group
The following table lists the location and description shown in the previous illustration.
Table 33. Preventing a Host from Joining a Group — Description
Location Description
1/21
• Interface TenGigabitEthernet 1/21
• ip pim sparse-mode
• ip address 10.11.12.1/24
• no shutdown
1/31
• Interface TenGigabitEthernet 1/31
• ip pim sparse-mode
• ip address 10.11.13.1/24
• no shutdown
314 Internet Group Management Protocol (IGMP)