PLANET XGS3-24040 - Manual (Page 409)

Chapter 44 IPv6 Multicast Protocol
44-7
(3) SPT Switch
Once the multicast router finds that the rate of the multicast packet from RP with destination address G
exceeds threshold, the multicast router will send Join message to the upper lever nodes in the source
direction, which results in the switch from RPT to SPT.
2. Preparation before PIM-SM configuration
(1) Configuration Candidate RP
More than one RPs (candidate RP) are permitted in PIM-SM network and each C-RP (Candidate RP)
takes charge of forwarding multicast packets with destination address in a certain range. To configure
more than one candidate RPs can achieve RP load balancing. There is no master or slave difference
among RPs. All multicast routers work out the RP corresponded with certain multicast group based on
the same algorithm after receiving the candidate RP message announced by BSR.
Note that one RP can serve more than one multicast groups, even all multicast groups. But each
multicast group can only correspond with one unique RP at any moment. It can’t correspond with more
RPs at the same time.
(2) BSR Configuration
As the management core of PIMSM network, BSR is in charge of collecting messages sent by
candidate RPs and broadcast them..
There may be only one BSR within a network. However, there may be several candidate BSRs to be
configured. With such arrangement, once a BSR fails, another may be switched to. C-BSR determines
BSR through automatic selection.
44.2.2 PIM-SM6 Configuration Task List
1． Enable PIM-SM (Required)
2． Configure static multicast routing entries (Optional)
3． Configure additional parameters for PIM-SM (Optional)
(1) Configure parameters for PIM-SM interfaces
1) Configure the interval for PIM-SM hello messages
2) Configure the holdtime for PIM-SM hello messages
3) Configure ACL for PIM-SM6 neighbors
4) Configure the interface as the boundary interface of the PIM-SM6 protocol
5) Configure the interface as the management boundary of the PIM-SM6 protocol
(2) Configure global PIM-SM parameters
1) Configure the switch as a candidate BSR
2) Configure the switch as a candidate RP
3) Configure static RP
4． Disable the PIM-SM protocol