I have attached the network topology to make things easier. Basically, I have external sites. The way routing works is the traffic on LAN get's forwarded to out Headquarters location for traffic filtering. Basically, everything get;s routing to us and then it goes out. I had an ISP tech at one of the external sites the other day and he mentioned to me that he was testing my bandwidth speed and noticed that he is not reaching what we should be getting, (he was plugged directly to the router so there is no middle man. I told him the traffic get's filtered through out headquarters via DMVPN tunnel.
My question is, what is the bandwidth cap in terms of using DMVPN? I am assuming it gets limited bandwidth because of DMVPN correct?.