Options accessed in router PIM context
Operation
rp-candidate priority [0-255]
Changes the priority for the C-RP router. When
multiple C-RPs are configured for the same multicast
groups, the priority determines which router becomes
the RP for such groups. A smaller value means a
higher priority. Default: 192
[no] spt-threshold
Changing the shortest-path tree (SPT) operation
on page 98
Disable or enable the router's ability to switch
multicast traffic flows to the shortest path tree.
Default: enabled
join-prune-interval [5-65535]
Changing the interval for PIM-SM neighbor
notification
on page 90
Option: Globally change the interval for the frequency
at which join and prune messages are forwarded on
the router's VLAN interfaces. Default: 60 seconds
trap [neighbor-loss | hardware-mrt-
full | software-mrt-full | all]
Option: Enable or disable PIM traps. Default: disabled
Configuring PIM-SM on the router
Global configuration context for supporting PIM-SM
Before configuring specific PIM-SM settings, it is necessary to enable IP routing, IP multicast routing, an IP
routing protocol, and PIM in the global configuration context. Also, if the router operates as an edge router for any
end points (receivers) expected to join multicast groups, it is also necessary to enable IGMP on the VLANs
supporting such receivers.
Configuring global context commands
NOTE:
PIM-SM operation requires an IP routing protocol enabled on the router. You can use RIP,
OSPF, and/or static routing. The examples in this section use RIP.
Syntax:
ip routing
no ip routing
Enables IP routing on the router.
The
no
form of the command disables IP routing. Note that before disabling IP routing, it is necessary to disable
all other IP routing protocols on the router.
(Default: Disabled)
Syntax:
ip multicast-routing
no ip multicast-routing
Chapter 4 PIM-SM (Sparse Mode)
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