New Setup , 1 ISP , 3 Routers, 3 Public IPs and 3 LANS

Friends,

I would need some urgent assistance from you in design and configuration. If anyone can help, I’ll truly appreciate

I have 3 cloud switch routers (switch crs226-24g-2s+rm). Lets call them (R1 , R2 and R3)

I have 3 environments (servers/nodes). Lets call them (ENV1 , ENV2 and ENV3)

Each Server/Node in an Environment has 3 LAN Cards.

I have one ISP that has given me 3 Public IPs.

All 3 envs have their cables terminating into their respective CloudRouter Switches

What I am looking for ? I need each environment under its own public IP, its own LAN (1 for mgmt network and 1 network for the server nodes to communicate across each other in their own environments). All three environments would be isolated from each other.

The WAN link from the ISP goes into one of the routers, say R1. How can I make such a network ?

Please help !