Configuring RPF override

Configure Reverse Path Forward (RPF) override to allow the override of the normal RPF lookup mechanism, indicating to the router that it may accept multicast traffic on an interface other than the one that would normally be selected by the RPF lookup mechanism.

RFP checking ensures that multicast traffic received arrived on the expected router interface before it is considered for further processing. If the RPF check fails for a multicast packet, the packet is discarded.

Prerequisites

You must be in the PIM configuration context, as indicated by the switch(config-pim)# prompt.

Procedure

Add, edit, or delete RPF overrides using the following command.

rpf-override <SRC-ADDR/SRC-MASK> <RPF-ADDR>

For example:

switch(config)# router pim
switch(config-pim)# rpf-override 40.0.0.4/24 30.0.0.4