- Gold, 750 points or more
apologies for the long post
The rules regarding multicast over multiple paths are clear. AD, then metric is used and in case of a tie, highest NH IP address router becomes the forwarder. so in no case duplicate packets would be received (constantly) by receivers.
the above applies when ONE source is used.
My issue is that I am planning on using 2 servers to multicast TV content. so, packets sent will be identical but sources different. there is no built in failover mechanism between these servers. so both have to be active and sending.
Using pim dense mode:
Routers in my network will be forwarding both packets as there will be 2 different entries ( S1,G) & (S2,G).
using pim sparse:
mroute will only have (*,G). does this mean rules I listed above will apply and routers will ensure only no packet duplication will occur ?
It doesn't really matter which RP is active. If the sources are active at the same time then the two streams will get to the receivers.
If the receiver is not able to choose between the two sources for the same stream then you need to make sure only one source is active at any given time for a specific multicast group.