My team will be working on upgrading our Headquarters network. We will be using 6509's as our access level switches. We are also using four 6509's in the distribution and a 7206 in the core. In each one of the distribution switches I have a WS-SVC-NAM-2. We are also using a Routed Access Design. I was reading the configuration documentation for the NAM modules and I came across SPAN, RSPAN, AND ERSPAN. Which one these configurations can I use in my network. I am not really catching the grasp of which one is right for my design. We are also using Cisco Works and I know you can push data from the NAM modules into Cisco Works. Which one of those configs will work with my design and allow me to see the data in Cisco Works?