QTECH QSW-8300 Инструкция по настройке - Manual (Page 273)

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Unicast route shall be used to carry out RPF examination for multicast protocol. So the
correctness of unicast route shall be guaranteed above all.
PIM-SM Protocol requires supports of RP and BSR, therefore you should use show ipv6 pim
bsr-router first to see if there is BSR information. If not, you need to check if there is unicast
routing leading to BSR.
Use show ipv6 pim rp-hash command to check if RP information is correct; if there is no RP
information, you still need to check unicast routing;
If all attempts fail to solve the problems on PIM-SM, then use debug commands such as
debug ipv6 pim/ debug ipv6 pim bsr, copy DEBUG information in 3 minutes and send to
Technology Service Center.
29.3 ANYCAST RP v6 Configuration
29.3.1 Introduction to ANYCAST RP v6
Anycast RP v6 is a technology based on PIM protocol, which provides redundancy in order to
recover as soon as possible once an RP becomes unusable.
The kernel concept of Anycast RP v6 is that the RP addresses configured all over the whole
network exist on multiple multicast servers (the most common situation is that every device
providing ANYCAST RP uses LOOPBACK interface, and using the longest mask to configures
RP addresses on this interface), while the unicast routing algorithm will make sure that PIM
routers can always find the nearest RP, thus , providing a shorter and faster way to find RP in a
larger network., Once an RP being used becomes unusable, the unicast routing algorithm will
ensure that the PIM router can find a new RP path fast enough to recover the multicast server
in time. Multiple RP will cause a new problem that is if the multicast source and the receivers
are registered to different RP, some receivers will not be able to receive data of multicast
source (obviously, the register messages only prefer the nearest RP). So, in order to keep the
communication between all RP, Anycast RP defines that the nearest RP to the multicast
source should forward the source register messages to all the other RP to guarantee that all
joiners of the RP can find the multicast source.
The method to realize the PIM-protocol-based Anycast RP is that: maintaining an ANYCAST
RP list on every switch configured with Anycast RP and using another address as the label to
identify each other. When one Anycast RP device receives a register message, it will send the
register message to other Anycast RP devices while using its own address as the source
address, to notify all the other devices of the original destination.
29.3.2 ANYCAST RP v6 Configuration Task
1. Enable ANYCAST RP v6 function
2. Configure ANYCAST RP v6