KB.15.15

it is the best path, and the specified multicast group traffic will

flow through the router.

RPT-tree A Yes setting indicates the route is using the RPT. A No setting

indicates the route is using the applicable SPT.

Downstream interfaces

For each downstream interface the following information is shown:

VLAN Lists the vid of the VLAN the router is using to send the outbound packets

of the current multicast flow to the next-hop router:

State Indicates whether the outbound VLAN and next-hop router for the current

multicast flow are receiving datagrams.

Pruned The router has not detected any joins from the current multicast flow and

is not currently forwarding datagrams in the current VLAN.

Forwarding The router has received a join for the current multicast flow and

is forwarding datagrams in the current VLAN.

Up Time (sec) Indicates the elapsed time in seconds since the router learned

the displayed information about the current multicast flow.

Expire Time (sec) Downstream interface entries for an mroute in PIM-SM

are only created when those interfaces become joined

for the mroute's flow. Unless join state is periodically

refreshed, a downstream interface will eventually move

from forwarding to pruned. When forwarding, Expire

Time indicates when the router expects forwarding to

end unless another join for the flow is received. After

moving to prune state, the downstream interface entry

will last for a short while longer, indicated by Expire

Time, before being removed completely.

Displaying PIM route data 83