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Lab
7.4.6 OSPF Default Information
Objectives:
- To inject a static default route
into the entire OSPF routing domain.
Note:
This is one of the most powerful
commands in OSPF routing. It informs all the routers in OSPF of an
exterior default route.
Complete the following steps:
- Setup the lab as shown in the diagram.
- Assign IP addresses to each interface.
- Enable OSPF as the routing protocol.
- Check to see if neighbor relationships exist between all routers
Verify your configurations are as follows:
RTA's configuration is:
hostname router-a
Loopback0
ip address 1.1.16.172 255.255.255.0
interface FastEthernet0/0
ip address 172.16.1.1 255.255.255.0
interface Serial0/0
ip address 192.168.0.1 255.255.255.0
clockrate 56000
router ospf 1
network 206.202.16.0 0.0.0.255 area 0
network 192.168.0.0 0.0.0.255 area 0
RTB's configuration is:
hostname router-b
interface Loopback0
ip address 2.0.168.192 255.255.255.0
interface Serial0/0
ip address 192.168.1.1 255.255.255.0
interface serial 0/1
ip address 192.168.0.2 255.255.255.0
clockrate 56000
router ospf 1
network 192.168.0.0 0.0.0.255 area 0
network 192.168.1.0 0.0.0.255 area 1
RTC's configuration is:
hostname router-c
interface Loopback0
ip address 2.1.168.192 255.255.255.0
interface Serial0/1
ip address 192.168.1.2 255.255.255.0
router ospf 1
network 192.168.1.0 0.0.0.255 area 1
Go to each router and issue the command
show ip route. Is there
a gateway of last resort?

On Router C:
Ping 172.16.1.1 and record your results below:

On Router A:
Issue the following commands:
router-a(config)#ip route 0.0.0.0 0.0.0.0 fe0/0
router-a(config)#router ospf 1
router-a(config-router)#default-information originate
router-a(config-router)#control Z
Go to each router and issue the command show ip
route.
Is there a gateway of last resort?

On Router C:
Ping 172.16.1.1 and record your results below:
Trace 195.6.0.1 and record your result below:


Note:
The exterior provider will setup and advertise a route back to
your OPSF network. This will allow packets back into your network
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