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Configuring the Assert Timeout

You configure the assert timeout to determine how often multicast routers running PIM sparse mode enter a PIM assert message cycle. Multicast routers running PIM sparse mode often forward the same stream of multicast packets onto the same LAN through the rendezvous-point tree (RPT) and shortest-path tree (SPT). PIM assert messages help routers determine which router forwards the traffic and prunes the RPT for this group.

Assert messages are useful for LANs that connect multiple routers and no hosts. For more information about network configurations using assert timeouts, see PIM Sparse-Mode SPT Cutover.

To configure the assert timeout for PIM sparse mode, include the assert-timeout statement:




assert-timeout seconds;

For a list of the hierarchy levels at which you can include this statement, see the statement summary section for this statement.

The range is from 5 through 210 seconds. The default is 210 seconds.

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