[c-nsp] DMVPN single cloud with resiliency

[David Barak]

Hi Luan,

I've built a dual hub DMVPN before, and it worked like a champ.  In my case, the two hub sites were ~15 miles apart, so there was good back-end connectivity.  I had dual spoke routers at about 15 remote sites, so there were under 40 routers involved total.

If you think of the capabilities of DMVPN/NHRP as being analagous to ARP, you'll be on the right track.

Conceptually, the difference is that of using HSRP on a LAN versus two routed interfaces: if you want some of your sites to prefer one path and some to prefer another, then dual-cloud would be better.  If you want all of your remote sites to prefer a single path, go with dual-hub.

David Barak
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--- On Wed, 1/16/08, Luan Nguyen <luan.m.nguyen at gmail.com> wrote:

> From: Luan Nguyen <luan.m.nguyen at gmail.com>
> Subject: [c-nsp] DMVPN single cloud with resiliency
> To: cisco-nsp at puck.nether.net
> Date: Wednesday, January 16, 2008, 4:49 PM
> Anyone out there running  a single cloud DMVPN with
> resiliency?  dual
> hubs...maybe dual spokes?
> What's the advantages of a single cloud versus a dual
> cloud?
> 
> Thanks.
> 
> -lmn
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