OSPF - Routing Protocols and Concepts - page 501

Document the command syntax, including the router prompt, for adding network statements to
the OSPF routing process.
Router(config-router)# network address wildcard-mask area area-id

4.

For single-area OSPF configurations, the area-id parameter is normally set to 0 . 5.

The wildcard-mask argument is simply the inverse of the subnet mask. List the corresponding
wildcard mask for each of the following subnet masks:

6.

255.255.255.0: 0.0.0.255

255.255.255.128: 0.0.0.127

255.255.255.192: 0.0.0.63

255.255.255.240: 0.0.0.15

255.255.0.0: 0.0.255.255

255.255.252.0: 0.0.3.255

255.255.240.0: 0.0.15.255

255.0.0.0: 0.255.255.255

255.224.0.0: 0.31.255.255

255.248.0.0: 0.7.255.255

Refer to Figure 11-3. In the space provided, document the correct commands, including the
router prompt, to configure RTA to advertise all directly connected networks in OSPF.

7.

Figure 11-3 RTA OSPF Configuration

192.168.1.0/26

RTA

192.168.1.252/30 192.168.1.244/30

RTA(config)# router ospf 1
RTA(config-router)# network 192.168.1.0 0.0.0.63 area 0
RTA(config-router)# network 192.168.1.244 0.0.0.3 area 0
RTA(config-router)# network 192.168.1.252 0.0.0.3 area 0

OSPF routers that share a common link become neighbors on that link. In Figure 11-4, RTB
and RTC are neighbors of RTA, but not of each other. These routers send each other OSPF
Hello packets to establish adjacency. These packets also act as keepalives so that each router
knows that adjacent routers are still functional.

8.