We are implementing an MPLS network between the main offices in different countries and keeping the existing domestic WAN comprised of IPSec/GRE tunnels between the regional offices and main office with a country.
We're looking for a way that we can identify which offices/countries are using what amounts of bandwidth on the MPLS cloud.
I am attaching a diagram to help show what we are looking for. For example, we would want to know how much bandwidth was used by users in the UK when they access the Exchange servers in China or how much bandwidth the users in China are consuming when using the Oracle servers in NY.
We have a NAM blade in a 6513 core switch in New York which I believe we could make use of with netflow. Would we need some sort of netflow device in each country's main office so we can collect statistics from there?
Thanks for the help.