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Command Usage
The multicast interface that first receives a multicast stream from a
particular source forwards this traffic to all other PIM interfaces on the
router. If there are no requesting groups on that interface, the leaf node
sends a prune message upstream and enters a prune state for this
multicast stream. The prune state is maintained until the
join-prune-holdtime timer expires or a graft message is received for the
forwarding entry.
Example

ip pim graft-retry-interval

Use this command to configure the time to wait for a Graft
acknowledgement before resending a Graft. Use the no form to restore
the default value.
Syntax
ip pim graft-retry-interval seconds
no ip pim graft-retry-interval
seconds - The time before resending a Graft. (Range: 0-65535)
Default Setting
3 seconds
Command Mode
Interface Configuration (VLAN)
Command Usage
A graft message is sent by a router to cancel a prune state. When a
router receives a graft message, it must respond with an graft
acknowledgement message. If this acknowledgement message is lost,
the router that sent the graft message will resend it a number of times
(as defined by the ip pim max-graft-retries command).
Console(config-if)#ip pim join-prune-holdtime 60
Console(config-if)#