Clearing The Related Pim Entries - 3Com 5500-EI PWR Install Manual

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The PIM prune delay function is applicable only to PIM-SM networks, but not to PIM-DM networks.

Upon receiving a prune message from a downstream device, the upstream node removes the interface

connecting the downstream node from the outgoing interface list of the (S, G) entry. If the downstream

node finds shortly after it has sent a prune message that a member for the multicast group is present on

the local subnet, it immediately sends a prune override message to the upstream to let the upstream

node cancel the prune action.

The Switch 5500-EI series Ethernet switches support prune delay configuration. Upon receiving a

prune message from a downstream node, the upstream node does not take a prune action immediately;

instead, it maintains the forwarding state of the interface to the downstream. If the upstream node

receives a prune override message from the downstream node within the prune delay interval, it

cancels the prune action; otherwise, it prunes the interface to the downstream when the prune delay

An appropriate PIM prune delay setting can reduce the number of prune/graft operations to

downstream nodes and thus lessen the burden to the device itself and the network.

Follow these steps to configure PIM prune delay:

Enter system view

Enter PIM view

Configure the PIM prune

delay interval