Technical Documentation



spt-threshold {infinity [ policy-names ];}

Hierarchy Level

[edit logical-systems logical-system-name protocols pim],[edit logical-systems logical-system-name routing-instances routing-instance-name protocols pim],[edit protocols pim],[edit routing-instances routing-instance-name protocols pim]

Release Information

Statement introduced in JUNOS Release 8.0.

Statement introduced in JUNOS Release 9.0 for EX Series switches.


Set the SPT threshold to infinity for a source-group address pair. Last-hop multicast routing devices running PIM sparse mode can forward the same stream of multicast packets onto the same LAN through an RPT rooted at the RP or an SPT rooted at the source. By default, last-hop routing devices transition to a direct SPT to the source. You can configure this routing device to set the SPT transition value to infinity to prevent this transition for any source-group address pair.

The remaining statements are explained separately.

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.

Published: 2010-04-16