Dell BigIron RX Series, Configuration Manual

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BigIron RX Series Configuration Guide 603
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PIM dense
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Modifying hello timer
This parameter defines the interval at which periodic hellos are sent out PIM interfaces. Routers
use hello messages to inform neighboring routers of their presence. The default rate is 60 seconds.
To apply a PIM hello timer of 120 seconds to all ports on the router operating with PIM, enter the
following.
BigIron RX(config)# router pim
BigIron RX(config-pim-router)# hello-timer 120
Syntax: hello-timer <10-3600>
The default is 60 seconds.
Modifying prune timer
This parameter defines how long a Brocade PIM router will maintain a prune state for a forwarding
entry.
The first received multicast interface is forwarded to all other PIM interfaces on the router. If there
is no presence of groups on that interface, the leaf node sends a prune message upstream and
stores a prune state. This prune state travels up the tree and installs a prune state.
A prune state is maintained until the prune timer expires or a graft message is received for the
forwarding entry. The default value is 180 seconds.
To set the PIM prune timer to 90, enter the following.
BigIron RX(config)# router pim
BigIron RX(config-pim-router)# prune-timer 90
Syntax: prune-timer <10-3600>
The default is 180 seconds.
Modifying the prune wait timer
The prune-wait command allows you to configure the amount of time a PIM router will wait before
stopping traffic to neighbor routers that do not want the traffic. The value can be from zero to three
seconds. The default is three seconds. A smaller prune wait value reduces flooding of unwanted
traffic.
A prune wait value of zero causes the PIM router to stop traffic immediately upon receiving a prune
message. If there are two or more neighbors on the physical port, then the prune-wait command
should not be used because one neighbor may send a prune message while the other sends a join
message at the during time or in less than three seconds.
To set the prune wait time to zero, enter the following commands.
BigIron RX(config)# router pim
BigIron RX(config-pim-router)# prune-wait 0
Syntax: prune-wait <time>
Where <time> has a minimum value of 60 seconds. The default is 60 seconds.
Viewing the prune wait time
To view the prune wait time, enter the following command at any level of the CLI.