
Customizing Protocol Independent Multicast
117355-D Rev 00
6-21
To modify the last-hop threshold, complete the following tasks:
Modifying the Rendezvous Point Threshold
By default, the RP router switches from the shared tree to the shortest-path tree
when the source sends data packets at a rate that exceeds 1024 bytes per second.
You can modify the rendezvous point threshold as follows:
• Change the data threshold rate (bytes per second).
• Specify a value from 0 through 64 for the RP data threshold to force the RP to
immediately switch from the shared tree to the SPT upon receiving the first
packet from the source.
• Disable the RP data threshold to ensure that PIM routers continue to receive
multicast traffic over the shared tree.
For more information about switching from the shared tree to the SPT, see “How
the RP Switches to the Shortest-Path Tree” on page 6-15.
Site Manager Procedure
You do this System responds
1. In the Configuration Manager window,
choose
Protocols
.
The Protocols menu opens.
2. Choose
IP
. The IP menu opens.
3. Choose
PIM
. The PIM menu opens.
4. Choose
Global
. The PIM Global Configuration window
opens.
5. Set the
following parameters:
• Last Hop Threshold
• Last Hop Data Threshold
Click on
Help
or see the parameter
descriptions beginning on page A-38.
6. Click on
OK
. You return to the Configuration Manager
window.
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