5 good questions and answers: "IP Multicast Routing - Foundation Summary"

What is the description for mroute flag S(sparse)?
Entry is operating in sparse mode.
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What is the description for mroute flag C (connected)?
A member of the multicast group is present on the directly connected
interface
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What is the description for mroute flag R (RP-bit set)?

Indicates that the (S,G) entry is pointing toward the RP. The RP is typically
in a pruned state along the shared tree after a downstream router has
switched to SPT for a particular source.
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What is the description for mroute flag F (register flag)
Indicates that the software is registering for a multicast source.
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What is the description for mroute flag T (SPT-bit set)?
Indicates that packets have been received on the shortest-path source tree.
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