SMC Networks SMC6724L3 manual 234

CONFIGURING THE SWITCH

not these neighbors are still active members of the multicast tree. (Range: 1-65535 seconds; Default: 30)

•Hello Holdtime – Sets the interval to wait for hello messages from a neighboring PIM router before declaring it dead. Note that the hello holdtime should be 3.5 times the value of Hello Interval.

(Range: 1-65535 seconds; Default: 105)

•Trigger Hello Interval – Configures the maximum time before transmitting a triggered PIM hello message after the router is rebooted or PIM is enabled on an interface. (Range: 1-65535 seconds; Default: 5)

-When a router first starts or PIM is enabled on an interface, the hello-interval is set to random value between 0 and the Trigger Hello Interval. This prevents synchronization of Hello messages on multi-access links if multiple routers are powered on simultaneously.

-Also, if a Hello message is received from a new neighbor, the receiving router will send its own Hello message after a random delay between 0 and the Trigger Hello Interval.

•Prune Holdtime – Configures of the hold time for the prune state. 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 prune holdtime timer expires or a graft message is received for the forwarding entry.

(Range: 1-65535 seconds; Default: 210)

•Graft Retry Interval – Configures the time to wait for a graft acknowledgement before resending a graft. 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 maximum number of times as defined by Max Graft Retries. (Range: 1-65535 seconds; Default: 3)

•Max Graft Retries – Configures the maximum number of times to resend a graft message if it has not been acknowledged. (Range: 1-65535; Default: 2)

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