3Com corebuilder 3500 Implementation Manual page 269

Figure 46 Example of Route Aggregation
78.1.1.0/24
78.1.2.0/24
78.1.3.0/24
.
.
.
78.1.254.0/24
78.1.2.32/27
78.1.2.64/27
78.1.2.96/27
.
.
.
78.1.192.0/27
If you plan your subnet addresses carefully, you can improve your
utilization of IP addresses and your routing tables will be easier to
maintain.
Router ABC
78.0.0.0/8
78.1.0.0/16
78.2.0.0/16
78.3.0.0/16
.
.
.
78.254.0.0/16
Key Concepts 269
78.254.32.0/19
78.254.64.0/19
78.254.96.0/19
.
.
.
78.254.192.0/19