Users Guide
Preventing a Source from Registering with the RP
To prevent the PIM source DR from sending register packets to RP for the specied multicast source and group, use the following
command. If the source DR never sends register packets to the RP, no hosts can ever discover the source and create a shortest
path tree (SPT) to it.
• Prevent a source from transmitting to a particular group.
CONFIGURATION mode
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 lter 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 lter, so it is allowed to forward both groups. As a result, Receiver 1 receives only one
transmission, while Receiver 2 receives duplicate transmissions.
Figure 93. Preventing a Source from Transmitting to a Group
The following table lists the location and description shown in the previous illustration.
564
Multicast Features