
Configuring IP, ARP, RIP, and OSPF Services
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Running OSPF with point-to-multipoint network interfaces addresses two
problems: how to minimize the number of subnets and the number of interfaces
required to support communications within the star topology. With
point-to-multipoint interfaces, each star topology requires only one subnet, rather
than one subnet for each PVC. Also, the hub needs to support only one interface
for each star rather than one interface for each PVC, reducing the demand for
resources on the router.
For details on frame relay, see Configuring Frame Relay Services.
Figure 6-3. Point-to-Multipoint Topology
Group mode PVC
Group mode or
direct mode PVC
BCN
AN4
AN3
AN2AN1
Frame relay
IP0016A
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