Above diagram is a typical model of a data center - local mid/enterprise customer.
Local SMB customers developing data center for production and DR sites are indecisive with the network design. Once they decide routers, switches and cabling arrangements, it is hard to change the network architecture here and there.
When it comes to a new installation, customer needs to plan the correct place for the new infrastructure in his data center model.
Installation engineer has three repetitive network related questions for any customer.
- What is your Management network IPs for the new servers/storage?
- What is your User Access LAN IPs (hostnames, gateways, network ...etc) ?
- What is your Private Data (inter server/nodes) network IPs (cluster interconnects …etc)?
Essentially, any data center should have above three Ethernet networks with required expandability, isolation and access control (security).
This is one of the simple facts in data center architecting and there are many more such as edge/core design, end of the rack / top of the rack and list goes on.
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