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Siemens S323 User Manual

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UMN:CLI                                                                                                                                                              User  Manual 
SURPASS hiD 6615 S223/S323 R1.5 
304                                                                         A50010-Y3-C150-2-7619 
1. Multicast packet
    transmitted to RP
(Rendezvous Point)
A
B
C
D
E
F
2. Ask RP for
    multicast packet
3. RP transmits multicast
    packet for the request
RP
2. Ask RP for
    multicast packet
3. RP transmits multicast
    packet for the request
 
Fig. 9.5 
RPT of PIM-SM 
 
Also, routers on packet route automatically optimize route by deleting unnecessary hops 
when traffic exceeds certain limit. After route to source and multicast group connected to 
the source are constituted, all sources have route to connect to receiver directly. 
In the below figure, packets are usually transmitted through『A→B→C→D』, but packets 
are transmitted through faster route『A→C→F』when traffic is increased. SPT (Shortest-
Path Tree) selects the shortest route between source and receiver regardless of RP, it is 
called source based tree or short path tree. SPT has (S, G) entry, “S” means source ad-
dress and “G” means multicast group. 
1. Multicast packet
    transmitted to RP
(Rendezvous Point)
D
A
C
B
2. Ask RP for
    multicast packet
3. RP transmits multicast
    packet for the request
RP
E
F
4. 
Optimized route by deleting unnecessary
     hops when traffic exceeds certain limit
Source
 
Fig. 9.6 
STP of PIM-SM 
 
9.3.1 
PIM Common Configuration 
Routing functionalities such as RIP, OSPF, BGP and PIM-SM are only available for hiD 
6615 S323. (Unavailable for hiD 6615 S223) 
 
!