Administrator Guide

ip pim register-filter
In the following example, Source 1 and Source 2 are both transmitting packets for groups 239.0.0.1 and 239.0.0.2. R3 has a PIM
register filter that only permits packets destined for group 239.0.0.2. An entry is created for group 239.0.0.1 in the routing table,
but no outgoing interfaces are listed. R2 has no filter, so it is allowed to forward both groups. As a result, Receiver 1 receives
only one transmission, while Receiver 2 receives duplicate transmissions.
Figure 87. Preventing a Source from Transmitting to a Group
The following table lists the location and description shown in the previous illustration.
Table 50. Preventing a Source from Transmitting to a Group — Description
Location Description
1/21
● Interface GigabitEthernet 1/21
● ip pim sparse-mode
● ip address 10.11.12.1/24
● no shutdown
1/31
● Interface GigabitEthernet 1/31
● ip pim sparse-mode
● ip address 10.11.13.1/24
Multicast Features 521