We are swapping some modules on a 6509-E. Currently there is on SUP-720 and I am putting in two SUP-720-3B's. I've preconfigured the 3B's in a separate 6509-E so I should just be able to swap them out. As far as configuration of other modules, there are 3 WS-X6748-GE-TX modules in the production 6509-E using the SUP-720. If I put in 3 WS-X6548-GE-TX modules in the extra 6509-E chassis running the two 720-3B's and mirror the configuration of the production WS-X6748-GE-TX modules, will the configuration exist when I swap the SUP cards?
Depends a lot on what configuration you have under the interfaces. If it is just vlan allocation, portfast, speed/duplex etc.. then yes it should work. If you also doing QOS config for example though there will be differences between the 2 modules.