I am looking for a network upgrade/refresh solution for a small/medium size company. Currently the DC aggregation, Core, and Internet Edge has 6509-Es pairs for each layer with dual SUP 720-10G. The utilization is low even for 6500s as the user base is only 500 to 600 for this campus.
There are some service appliances connected to DC Aggregation (F5s, DC ASA Pair), Core (Aruba Wireless Controllers, 3900 Tunnel Routers), Internet Edge (ASA Pair). There is only default route from ISP BGP link and outbound advertisement of few networks. DC Access is N5Ks with FEXs and N3Ks (not looking to replace as it still has plenty of life).
I am considering a pair of Nexus 7700 with VDCs as an option. This pair of N7K with VDC will serve for each layer; DC Aggregation, Campus Core, and Internet Edge.
Given the above requirements does it makes sense to get a powerful 7700 pair and carve out 3 VDCs each for the three layers? I am assuming I can easily connect all service appliances to N7Ks.
Does it pose any risk or any limitation? Any suggestions/recommendations/experience sharing would be helpful. Specially I have not seen VDCs with Internet edge so I am specially curious about it.
Thanks
