What's a simple way to implement a L2 network across 2 L3 DCs connected by 2x1Gig links using a 6504-E with SUP720-3C?! The DCs are only a few kilometres apart and our local service provider can only provide 1Gig fiber links between DCs (which I can then configure as L2 or L3). I do not want to simply configure flat L2 across both DCs - I would like to keep each DC as a separate L3 site and run OSPF for fast convergence and therefore avoid spanning-tree altogether.
At the moment each DC uses 3750 switches connected by L3 links and runs EIGRP. We then use separate hardware (7200) and L2TPv3 to create some shared L2 networks across that. We're moving to the 6500 platform and so it's a good opportunity to redesign things - and hopefully I can minimise the amount of hardware needed and consolidate using only the 6500 platform in each DC.
I also have a Cisco ACE appliance to fit at each site and to have redundancy for these they need to live in a shared network! That's what happens when the design process starts after the kit has already been brought (not my choice btw!).