Black Box LGB6026A, Management Manual

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C
HAPTER
48 | Multicast Routing Commands
PIM Multicast Routing
D
EFAULT
S
ETTING
210 seconds
C
OMMAND
M
ODE
Interface Configuration (VLAN)
C
OMMAND
U
SAGE
The multicast interface that first receives a multicast stream from a
particular source forwards this traffic to all other PIM interfaces on the
router. If there are no requesting groups on that interface, the leaf node
sends a prune message upstream and enters a prune state for this
multicast stream. The prune state is maintained until the join-prune-
holdtime timer expires or a graft message is received for the forwarding
entry.
E
XAMPLE
Console(config-if)#ip pim join-prune-holdtime 60
Console(config-if)#
ip pim lan-prune-
delay
This command causes this device to inform downstream routers of how
long it will wait before pruning a flow after receiving a prune request. Use
the
no form to disable this feature.
S
YNTAX
[ no ] ip pim lan-prune-delay
D
EFAULT
S
ETTING
Disabled
C
OMMAND
M
ODE
Interface Configuration (VLAN)
C
OMMAND
U
SAGE
◆
When other downstream routers on the same VLAN are notified that
this upstream router has received a prune request, they must send a
Join to override the prune before the prune delay expires if they want
to continue receiving the flow. The message generated by this
command effectively prompts any downstream neighbors with hosts
receiving the flow to reply with a Join message. If no join messages are
received after the prune delay expires, this router will prune the flow.
◆
Prune delay is the sum of the effective propagation-delay and effective
override-interval, where effective propagation-delay is the largest
propagation-delay from those advertised by each neighbor (including
this switch), and effective override-interval is the largest override-
interval from those advertised by each neighbor (including this switch).