DMVPN Design using ISP by modem redundancy alongside with rays.

I'm working on a new DMVPN configuration with a 3745 on hub site and a 1941 speak it. I have internet via gsm for the first line speaks it and a DSL for backup on talk.

I have a tunnel on the spokes and the hub interfaces. Currently my VPN tunnel is coming up fine, however we are planing to do a failover from the ISP next with rays. given that in the tunnel interface, I can define only a "tunnel source interface" which is the cell interface gsm, I don't know how to use my ISP one another for the same tunnel interface because it will always launch gsm traffic.

that I have to create another interface of tunnel with same hub site, or do I need another hub as backup?

is their any other way to create the loopback interface and initiate this loopback traffic?

Does anyone have any suggestions on how I have to design? or someone has an idea what could be the problem?

Thank you.

Hello

There are many designs to implement A high-availability in DMVPN.  Basically, the design decisions are based on infrastructure, budget, and if you are looking to implement HA for devices DMVPN, ISP links or both.

on your scenario, you seem to be looking to implement redundancy for DMVPN HA ISP on the right talk. This scenario can be achieved by a single pivot double-cloud design, with double-hub it may also be more highly available.

The elements of design for your scenario:

-2 interfaces tunnel using two interfaces physical sources talked about it.

-two interfaces of tunnel in the hub, they can share the same physical interface.

-Point-key: using of protocols of dynamic routing in the two clouds with different 'links between costs', so that the main connection at lower cost, and the second connection has the higher cost (to use at default)

I hope this helps you

------------------
Mercury Alshboul

Tags: Cisco Security

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