PIM-Sparse Mode (PIM-SM) | 1109
ip pim spt-threshold
c e
Configure PIM router to switch to shortest path tree when the traffic reaches the specified threshold
value.
Syntax
ip pim spt-threshold value | infinity
To return to the default value, enter no ip pim spt-threshold.
Parameters
Defaults
Not configured.
Command Modes
CONFIGURATION
Command
History
Usage
Information
This is applicable to last hop routers on the shared tree towards the Rendezvous Point (RP).
no ip pim snooping dr-flood
e
x
Disable the flooding of multicast packets to the PIM designated router.
Syntax
no ip pim snooping dr-flood
To re-enable the flooding of multicast packets to the PIM designated router, enter the ip pim
snooping
dr-flood command.
Defaults
Enabled.
Command Modes
CONFIGURATION
Command
History
Usage
Information
By default, when you enable PIM-SM snooping, a switch floods all multicast traffic to the PIM
designated router (DR), including unnecessary multicast packets. To minimize the traffic sent over the
network to the designated router, you can disable designated-router flooding.
When designated-router flooding is disabled, PIM-SM snooping only forwards the multicast traffic,
which belongs to a multicast group for which the switch receives a join request, on the port connected
towards the designated router.
If the PIM DR flood is not disabled (default setting):
• Multicast traffic is transmitted on the egress port towards the PIM DR if the port is not the
incoming interface.
• Multicast traffic for an unknown group is sent on the port towards the PIM DR. When DR
flooding is disabled, multicast traffic for an unknown group is dropped.
value
(OPTIONAL) Enter the traffic value in kilobits per second.
Default: 10 packets per second. A value of zero (0) will cause a switchover on the first
packet.
infinity (OPTIONAL) To never switch to the source-tree, enter the keyword infinity.
Version 8.1.1.0 Introduced on E-Series ExaScale
Version 8.4.1.1 Introduced on E-Series ExaScale
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