Black Box LGB6026A, Management Manual

Page: 1245 / 1289

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C
HAPTER
48 | Multicast Routing Commands
PIM Multicast Routing
D
EFAULT
S
ETTING
500 milliseconds
C
OMMAND
M
ODE
Interface Configuration (VLAN)
C
OMMAND
U
SAGE
The override interval configured by the ipv6 pim override-interval
command and the propogation delay configured by this command are used
to calculate the LAN prune delay. If a downstream router has group
members which want to continue receiving the flow referenced in a LAN
prune delay message, then the propagation delay represents the time
required for the lan-prune-delay message to be propgated down from the
upstream router to all downstream routers attached to the same VLAN
interface.
E
XAMPLE
Console(config-if)#ipv6 pim propagation-delay 600
Console(config-if)#
R
ELATED
C
OMMANDS
ipv6 pim override-interval (1242)
ipv6 pim lan-prune-delay (1240)
ipv6 pim state-
refresh origination-
interval
This command sets the interval between sending PIM-DM state refresh
control messages. Use the
no form to restore the default value.
S
YNTAX
ipv6 pim state-refresh origination-interval seconds
no ipv6 pim max-graft-retries
seconds - The interval between sending PIM-DM state refresh
control messages. (Range: 1-100 seconds)
D
EFAULT
S
ETTING
60 seconds
C
OMMAND
M
ODE
Interface Configuration (VLAN)
C
OMMAND
U
SAGE
◆
The pruned state times out approximately every three minutes and the
entire PIM-DM network is reflooded with multicast packets and prune
messages. The state refresh feature keeps the pruned state from
timing out by periodically forwarding a control message down the
distribution tree, refreshing the prune state on the outgoing interfaces
of each router in the tree. This also enables PIM routers to recognize