How to advertise subnet into OSPF without network or redistribution command

During my CCIE R&S preparation for lab exam, I encounter a task that requested me to advertise a subnet into OSPF routing protocol, but without using network statement or redistribution command. Since back then I was a little confuse about this, I said to post here maybe it help others.

Please download the topology used in this example here. We have already OSPF prepared and the task request to advertise interface Loopack0 from R0 to OSPF without using network statement or redistribution command.

See how to do it here:

Dynamips: How to save vlans after switch reload

Most of you already know that in Dynamips after a reload of a switch all the vlans and vtp configurations are gone. There is a way how to save the vlan and vtp configuration even in case of a reload of the switch and I will show you below how to do it. For switch emulator I used a Cisco 3640 IOS image with a NM-16ESW module to have Layer 2 port on the device.

Click below to see the movie and explanation:

How to save vlans after switch reload
How to save vlans after switch reload