Aggregating OSPF Networks

You can aggregate OSPF networks at the border of an OSPF area by using the area range command. You can also aggregate OSPF networks when entering the border of the OSPF domain by using the summary-address command for IP routes and the summary-prefix command for IPv6 routes.

To create an area range:

  1. Configure the interface’s IP addresses using the ip address command.
  2. Enable OSPF using the router ospf command.
  3. Configure the network area with the network area command.
  4. Configure the area range with the area range command.

area range

summary-address

summary-prefix