I would appreciate if you could help me on this .
We are planning to build new Datacenter (Green Field) and migrate the services from Current to New Datacenter.
I'm bit stuck in finalizing the DC architecture as we have some budget constraints . Keeping the current environment in mind we have decided to go for single tier LAN architecture . Reason we are going for HP blade for Virtual environment and storage . Please help me to understand if there is any issues if we proceed with Single tier architecture meaning only Core layer (no aggregation and Access layer).
Enclosing the skeleton architecture diagram
Details of the Current environment:
Egde Switches and Routers for WAN link termination
Cisco ASA for remote users
Aruba Access Switches
HP Blade Chassis for VM environment
Blades for physical environment
EMC VNX storage and Avamar backup
160 Vm’s and close to 16 physical server’s in the current environment .
DC1 - Primary datacenter ,eventually all the applications/services will be migrated to here from the Current DC
DC2 – Secondary DC ,act as a DR site for all the physical workloads
Amazon Web services – DR Site for all the virtual workloads.