Dell PowerEdge M820 Dell PowerConnect M6220/M6348/M8024 Switches Configuration - Page 150
Example: PIM-DM, First, con an OSPF
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To minimize the repeated flooding of datagrams and subsequent pruning associated with a particular source-group (S,G) pair, PIM-DM uses a State Refresh message. This message is sent by the router(s) directly connected to the source and is propagated throughout the network. When received by a router on its RPF interface, the State Refresh message causes an existing prune state to be refreshed. State Refresh messages are generated periodically by the router directly attached to the source. PIM-DM is appropriate for: • Densely distributed receivers • A ratio of few senders-to-many receivers (due to frequent flooding) • High volume of multicast traffic • Constant stream of traffic Example: PIM-DM The following example configures PIM-DM for IPv4 on a router. First, configure an OSPF1 router and globally enable IP routing, multicast, IGMP, and PIM-DM. Next, enable routing, IGMP, PIM-DM, and OSPF on one more interfaces. console#configure router ospf router-id 3.3.1.1 exit ip routing ip multicast ip igmp ip pimdm interface vlan 1 routing ip address 3.3.3.1 255.255.255.0 ip pimdm ip igmp ip ospf area 0 exit interface vlan 3 routing ip address 1.1.1.1 255.255.255.0 ip pimdm ip igmp ip ospf area 0 exit exit 1. OSPF configuration is added as a unicast protocol for illustration purposes; static unicast routing can also be configured.