System information

Configuring IP Multicast Routing
8-11
MOT(config-dvmrp)#route-limit <n>
where:
n is the number of DVMRP route reports.
Setting the DVMRP Prune Lifetime Value
DVMRP uses a basic multicast model to build a parent-child database. This database
is used to create a forwarding tree that originates at the source where multicast
packets are generated. Multicast packets are initially flooded down the forwarding
tree making parent-child links. If there are redundant paths (parent-child links) on the
forwarding tree, packets are not forwarded along those paths. Forwarding occurs until
prune messages are received on the forwarding tree, which further holds back
multicast packet broadcasts. Pruning is initiated from the leaf router, where there are
no multicast members.
The prune lifetime is the amount of time a prune state is maintained on a router before
it times out. Use the prune lifetime command in Router Configuration mode to set
the life-time value for DVMRP prune messages that are received on parent-child links
to improve throughput, as shown below:
MOT(config-dvmrp)#prune lifetime <n>
where:
n is the prune lifetime value from 5 to 7200 seconds.
Configuring DVMRP on a Routing Interface
Use the following sections to configure DVMRP on the BSR routing interface:
• Filtering Incoming DVMRP Reports
• Filtering Outgoing DVMRP Routing Reports
• Distributing the Default DVMRP Network to Neighbors
• Adding a Metric Offset to the DVMRP Route
• Setting the DVMRP Neighbor Time-out Interval
• Delaying DVRMP Reports
• Setting the DVMRP Probe Interval