System information

BSR 64000 Configuration and Management Guide
8-2
Enabling IP Multicast Routing on the BSR
IP multicast routing allows the BSR to forward IP multicast packets over the network.
Use the ip multicast-routing command in Global Configuration mode to enable IP
multicast routing on the BSR, as shown below:
MOT(config)#ip multicast-routing
Configuring PIM
Use the following sections to configure PIM on the BSR:
• About PIM
• Enabling PIM
• Delaying Shortest Path Tree Usage for Better Throughput
• Defining the PIM Domain Border
• Configuring Candidate BSRs
• Configuring Candidate RPs
• Modifying the PIM Router-Query Message Interval
About PIM
Protocol-Independent Multicast (PIM) is used to efficiently route to multicast groups
that might span wide-area and inter-domain internetworks. It is referred to as
“protocol independent” because it is not dependent on any particular unicast routing
protocol.
PIM is IP routing protocol independent because it can use any unicast routing
information to forward multicast traffic. Even though PIM is a multicast routing
protocol, it uses the unicast routing table to perform Reverse Path Forwarding (RPF),
instead of creating an independent multicast routing table. However, unlike most
unicast routing protocols, PIM does not send and receive multicast routing updates
between routers.