HP 3500YL - Manual (Page 146)

PIM-SM (Sparse Mode)
Configuring PIM-SM on the Router
Changing the Global Join-Prune Interval on the Router
Syntax: router pim join-prune-interval <5 - 65535>
Sets the interval in seconds at which periodic PIM-SM join/
prune messages are to be sent on the router’s PIM-SM inter­
faces. This setting is applied to every PIM-SM interface on
the router. (Default: 60 seconds)
Note: All routers in a PIM-SM domain should have the same
join-prune-interval setting.
Changing the Shortest-Path Tree (SPT) Operation
Generally, using the SPT option eliminates unnecessary levels of PIM-SM
traffic in a domain. However, in cases where it is necessary to tightly control
the paths used by PIM-SM flows to edge switches, disabling SPT maintains the
flows through their original C-RPs regardless of whether shorter paths exist.
Syntax: router pim spt-threshold
[no] router pim spt-threshold
When the router is the edge router for a receiver requesting to
join a particular multicast group, this command enables or
disables the capability of the router to convert the group’s
traffic from the RPT (Rendezvous Point Tree) to the SPT
(shortest path tree). For more information, refer to
“Restricting Multicast Traffic to Rendezvous-Point Trees
(RPTs)” on page 4-11.
(Default: Enabled.)
Statically Configuring an RP To Accept Multicast Traffic
A given static-RP entry should be manually configured on all routers in the
PIM-SM domain. For information on applying static-RPs in a domain, refer
to “Static Rendezvous Point (Static-RP)” on page 4-17.
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