Cisco DMVPN Configuration

In this technical demonstration, we will start with the core block of DMVPN which is GRE. 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 or point-to-multipoint links over an Internet Protocol network.

We will then move to add the DMVPN configuration parameters. Depending on the DMVPN phase you want to implement, DMVPN can be enabled with just a few commands. Obviously you need to have the underlay in place as you know DMVPN operates as the overlay that lays up an existing underlay network.

In this demonstrationWe will go through DMVPN phase 1 which was the starting point of DMVPN and we will touch on DMVPN phase 3. We will have a look at the various DMVPN and NHRP configuration parameters along with the show commands.

[dinamik]

Hello! I try to play with the same topology on CML. I wonder what is the configuration of SP? I can ping R11 from switch1 and switch0, but I cannot ping switch0 to switch1 and vise versa. It looks like I need some routing on SP as well.