87
Figure 35 Information exchange between C-RPs and BSR
Based on the information in the RP-set, all routers in the network can select an RP for a specific multicast
group based on the following rules:
1. The C-RP that is designated to a smallest group range wins.
2. If the C-RPs are designated to the same group range, the C-RP with the highest priority wins.
3. If the C-RPs have the same priority, the C-RP with the largest hash value wins. The hash value is
calculated through the hash algorithm.
4. If the C-RPs have the same hash value, the C-RP with the highest IP address wins.
RPT building
Figure 36 RPT building in a PIM-SM domain
As shown in Figure 36, the process of building an RPT is as follows:
1. When a receiver wants to join the multicast group G, it uses an IGMP message to inform the
receiver-side DR.
Source
Server
Host A
Host B
Host C
Receiver
Receiver
Multicast packets
RPT
Join message
RP DR
DR
To Next Page
Loading...
