DescriptionIn Multicast dense mode is expected flooding of traffic on all related interfaces expect those to same destination.
SolutionThe reason is mentioned on RFC 3973 as follows:
"(S,G) State
For every source/group pair (S,G), a router stores the following state:
(S,G) state:
For each interface:
Local Membership:
State: One of {"NoInfo", "Include"}
PIM (S,G) Prune State:
State: One of {"NoInfo" (NI), "Pruned" (P), "PrunePending" (PP)}
Prune Pending Timer (PPT)
Prune Timer (PT)
(S,G) Assert Winner State:
State: One of {"NoInfo" (NI), "I lost Assert" (L), "I won Assert" (W)}
Assert Timer (AT)
Assert winner's IP Address
Assert winner's Assert Metric"
There are three states:
NoInfo (NI)
This router has no (S,G) Assert state on interface I.
I am Assert Winner (W)
This router has won an (S,G) Assert on interface I. It is now responsible for forwarding traffic from S destined for G via interface I.
I am Assert Loser (L)
This router has lost an (S,G) Assert on interface I. It must not forward packets from S destined for G onto interface I."
After initial flooding only one path to same destination will be elected as "Winner"
