PIM used by routers to forward multicast traffic between the routers, PIM works mainly in two modes
1) PIM Dense Mode
2) PIM Sparse Mode
PIM Dense Mode:
--> PIM dense mode is going to use flood and prune mechanism
--> In this mode sender or source is going to send multicast traffic to other multicast routers, Then this routers will send this multicast traffic to other routers. This is called as Flooding.
--> Routers receive multicast traffic from sender or source on incoming interface and then it forwards this multicast traffic on one or more outgoing interfaces( pointing towards receivers).
--> Routers which are interested in receiving the traffic will add (S,G) entry in the multicast routing table.
--> Here S= Sender or Source IP Address & G = Destination Multicast Address.
--> Routers which are not interested in receiving multicast traffic will simply inform other routers don't send multicast traffic. This is called as Pruning.
--> This method is also called as PUSH method.
--> It uses Source tree for distributing multicast traffic.
--> (S,G) entries are preferred compared to (*,G) entries in the multicast routing table.
--> PIM Dense method is easy to configure on the routers but used only on small networks.
Reference: Cisco
1) PIM Dense Mode
2) PIM Sparse Mode
PIM Dense Mode:
--> PIM dense mode is going to use flood and prune mechanism
--> In this mode sender or source is going to send multicast traffic to other multicast routers, Then this routers will send this multicast traffic to other routers. This is called as Flooding.
--> Routers receive multicast traffic from sender or source on incoming interface and then it forwards this multicast traffic on one or more outgoing interfaces( pointing towards receivers).
--> Routers which are interested in receiving the traffic will add (S,G) entry in the multicast routing table.
--> Here S= Sender or Source IP Address & G = Destination Multicast Address.
--> Routers which are not interested in receiving multicast traffic will simply inform other routers don't send multicast traffic. This is called as Pruning.
--> This method is also called as PUSH method.
--> It uses Source tree for distributing multicast traffic.
--> (S,G) entries are preferred compared to (*,G) entries in the multicast routing table.
--> PIM Dense method is easy to configure on the routers but used only on small networks.
Reference: Cisco
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