Point-to-Multipoint

Point-to-Multipoint
A point-to-multipoint environment is very similar to the point-to-point environment. No DR or
BDR is chosen. All PVCs are treated as point-to-point links. The only difference is that all the
PVCs go back to a single router. Figure 5.5 depicts the difference between a true point-to-point
environment and a point-to-multipoint deployment.
A point-to-multipoint network will send Hello packets every 30 seconds and the Dead
interval is four times the Hello interval, 120 seconds. The ip ospf network point-tomultipoint
command can be used in interface configuration mode to set the network type
as point-to-multipoint. The default behavior of simulating broadcasts is assumed, unless
the command is followed by the non-broadcast parameter. OSPF also implements host
routes to ensure spoke-to-spoke reachability in a point-to-multipoint network environment.
Now that you understand the basics of OSPF, we’re going to show you how to configure
OSPF in a single area environment