Cisco CCNA Packet Tracer Ultimate labs: GRE Tunneling. Answers Part 2

Packet Tracer file (PT Version 7.1) : https://goo.gl/fZ72Sa Get the Packet Tracer course for only $10 by clicking here: https://goo.gl/vikgKN Get my ICND1 and ICND2 courses for $10 here: https://goo.gl/XR1xm9 (you will get ICND2 as a free bonus when you buy the ICND1 course). For lots more content, visit http://www.davidbombal.com - learn about GNS3, CCNA, Packet Tracer, Python, Ansible and much, much more. #CCNA #PacketTracer #CCENT You need to know GRE for the CCNA exam. Generic Routing Encapsulation (GRE) is a tunneling protocol developed by Cisco Systems that can encapsulate a wide variety of network layer protocols inside virtual point-to-point links over an Internet Protocol network. Transcription: In this lab you need to configure a GRE tunnel. Now we need to configure a GRE tunnel between Customer Router 1 and 2 so that the PCs can ping each other. So on Customer Router 1, we're going to create a tunnel interface. We'll use 0 as the tunnel number. IP address that we'll use is 10.1.3.1/24 mask. In the real world, you probably want to use a /30 mask to conserve IP addresses. But we don't need to worry about that for the lab. We then need to specify a tunnel source. In this case the tunnel source will be gigabit 0/0/1 Now you don't have to use the local interface. As the source, you could specify the local router’s IP address if you want to but I've used the interfaces in this example. The tunnel destination will be the router on the other side which is Router 2. Now in this a lab, the routers are using DHCP addresses on the internet facing interfaces. In the real world you're going to want to use static IP addresses because if these addresses change, your tunnels will break. But that's okay for this lab. The tunnel interface has come up because the local router has IP reachability to the destination. That doesn't mean that the tunnel is going to work because we need to still configure the other side. So the tunnel is up now. On Router 2 int