In this YouTube “playing in the lab” IWAN fun we are going to have 2 phones (one in Branch 1 and one in Branch 3)  doing a voice/video call. We will use LiveAction to see that the video call between the 2 branches is actually going directly spoke-to-spoke despite the fact that they are on an mGRE tunnel with a DMVPN hub in the Hub Site. We will confirm what LiveAction is seeing via command line on Branch1 Router 1 and see the NHRP shortcuts that this router has to go directly to the Router 3’s direct IP address that it uses to connect to the MPLS cloud.

We will then ask what might happen if a brownout impairment were to occur on the Branch1_Router1 link with the MPLS PE.  For example – 2% loss.  We will look at a little of the PfRv3 configs up on the domain master controller as well as Branch1_Router1’s master policy that it received from the domain master controller.  Then we will cause impairment (2% loss) to the MPLS link… during which I have a video recording of the phone call… where … pretty much… the move over from the primary channel to the backup channel is a non event as far as trying to see it on the phone call.

CPOC (Customer Proof of Concept) CONFIG Snippets

Little_IWAN_Fun_Config_Snippet.zip       <– Thanks to Steve Moore and Robert Kintner  🙂

…. Hope you have fun with the video and playing in the lab with me.  🙂

Click on the diagram below to go play.  🙂

Approx time: 28 Minutes