MicroNugget: How to Use Dynamic IPs Using FlexVPN and IKEv2

In this video, Keith Barker will cover how to use dynamically assigned IP addresses to create a hub and spoke environment using FlexVPN and IKEv2. People often wonder if it’s possible to set up this kind of environment with a dynamically assigned IP on the hub interface, and Keith describes how to do just that.

It’s absolutely possible to set up and run a hub and spoke environment with dynamically assigned IP addresses. In fact, we’ve been using dynamic multipoint VPNs for close to a decade, and it’s actually very easy to do.

If you want to employ a dynamically assigned IP address for the hub’s interface that’s connected to the internet, it’s doable but does involve some additional steps. You’ll need to get the R1 hub IP address into DNS, which will allow you to set up this kind of topology and secure it with IPSec.

Keith will walk you through the steps of this process, examining the theory behind it as well as the hands-on, how-to aspects.

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[sabkarthik]

Hi Keith,
I am one of you big fan and thanks for this great post, I tried implementing the same way, but i am facing a strange issue.
All the spoke locations are learning every other spoke lan routes, but i am not able to ping them.
Its there in the routing table, but not able to ping other spoke locations addresses from any SPOKE router.
But from HUB i am able to ping all SPOKe location routes.

I am using IOS in gns3.

Could you please me let me know which IOS image you used and also where i am going wrong.

Thanks in Advance,
Karthik