Multicast 125
• 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 OSPF
1
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 could also be
configured.
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