3Com Switch 8800 Configuration Guide Chapter 29 PIM-SM Configuration
29-3
It should be noted that one RP can serve multiple multicast groups or all multicast
groups. Each multicast group can only be uniquely correspondent to one RP at a time
rather than multiple RPs.
II. Configuring BSRs
The BSR is the management core in a PIM-SM network. Candidate-RPs send
announcement to the BSR, which is responsible for collecting and advertising the
information about all candidate-RPs.
It should be noted that there can be only one BSR in a network but you can configure
multiple candidate-BSRs. In this case, once a BSR fails, you can switch over to another
BSR. A BSR is elected among the C-BSRs automatically. The C-BSR with the highest
priority is elected as the BSR. If the priority is the same, the C-BSR with the largest IP
address is elected as the BSR.
III. Configuring static RP
The router that serves as the RP is the core router of multicast routes. If the dynamic
RP elected by BSR mechanism is invalid for some reason, the static RP can be
configured to specify RP. As the backup of dynamic RP, static RP improves network
robusticity and enhances the operation and management capability of multicast
network.
29.2 PIM-SM Configuration 1) PIM-SM basic configuration includes:
z Enabling Multicast
z Enabling PIM-SM
z Entering the PIM view
z Configuring candidate-BSRs
z Configuring candidate-RPs
z Configuring static RP
2) PIM-SM advanced configuration includes:
z Configuring the PIM-SM domain boundary
z Configuring the sending interval for the Hello packets of the interface
z Configuring the filtering of multicast source/group
z Configuring the filtering of PIM neighbor
z Configuring the maximum number of PIM neighbor on an interface
z Configuring RP to filter the register messages
z Limiting the range of legal BSR
z Limiting the range of legal C-RP
z Clearing multicast route entries from PIM routing table
z Clearing PIM neighbor