Administrator Guide

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 86. Preventing a Source from Transmitting to a Group
Table 48. Preventing a Source from Transmitting to a Group — Description
Location Description
1/21
• Interface GigabitEthernet 1/21
• ip pim sparse-mode
Multicast Features 627